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In dit document wordt beschreven hoe u fusierouters configureert in een Cisco SDA-oplossing (Cisco Software-Defined Access of SD-Access).
Er zijn geen specifieke vereisten van toepassing op dit document.
Opmerking: installatie is vereist volgens Ondersteunde apparaten die u kunt vinden onder Link to Release Notes
De informatie in dit document is gebaseerd op de volgende hardware-versies:
De informatie in dit document is gebaseerd op de apparaten in een specifieke laboratoriumomgeving. Alle apparaten die in dit document worden beschreven, hadden een opgeschoonde (standaard)configuratie. Als uw netwerk live is, moet u zorgen dat u de potentiële impact van elke opdracht begrijpt.
In de Cisco SD-Access oplossing worden apparaten beheerd en geconfigureerd door Cisco Catalyst Center. In het algemeen kunnen alle onderdelen van de SD-Access-fabric worden geconfigureerd en beheerd door Cisco Catalyst Center. Het fusieapparaat bevindt zich echter buiten de fabric en wordt dus handmatig geconfigureerd. Border Automation, hierna besproken, is een functie binnen Cisco Catalyst Center die de grensconfiguratie voor de overdracht van VRF's naar de Fusion-apparaten kan automatiseren.
Om redenen die gewoonlijk verband houden met de compatibiliteit met de huidige configuratie, is grensautomatisering soms niet geschikt, en dus kan de overdracht van de grens naar het fusieapparaat ook met de hand worden geconfigureerd. Inzicht in de gebruikte configuratie helpt belangrijke details te illustreren over de optimale configuratie en werking van het hele systeem.
Een Fusion-apparaat maakt het lekken van Virtual Routing and Forwarding (VRF) over SD-Access Fabric-domeinen mogelijk en maakt hostconnectiviteit met gedeelde services mogelijk, zoals DHCP, DNS, NTP, ISE, Cisco Catalyst Center, Wireless LAN-controllers (WLC) en dergelijke. Hoewel deze rol door andere apparaten dan routers kan worden vervuld, wordt in dit document alleen gekeken naar routers als fusieapparaten.
Zoals eerder vermeld, moeten de gedeelde diensten ter beschikking worden gesteld van alle virtuele netwerken (VN) op de Campus. Dit wordt bereikt door de aanmaak van BGP-peerings (Border Gateway Protocol) van de grensrouters naar de Fusion Routers. Op de Fusion Router worden de subnetten van de VRF van de stof die toegang tot deze gedeelde diensten nodig hebben in GRT, of de gedeelde diensten VRF uitgelekt, en vice versa. Routekaarten kunnen worden gebruikt om specifieke routingtabellen voor SD-Access-fabrics in op te nemen.
Opmerking: SD-Access border-knooppunten ondersteunen geen overzichtsroutes die overlappen met SD-Access IP-pools. Overzichtsroutes die overlappen met IP-pools moeten worden gefilterd in het routeren van advertenties van Fusion-apparaten naar border-knooppunten.
De hier gegeven configuratiedetails zijn met betrekking tot de hieronder getoonde netwerktopologie. Deze netwerktopologie is geen aanbevolen topologie voor implementaties. Deze topologie wordt hier alleen gebruikt om de presentatie van de gegeven configuratievoorbeelden te vergemakkelijken. Raadpleeg Design Zone for Cisco Digital Network Architecture (Designzone voor digitale netwerkarchitectuur van Cisco) voor de aanbevolen implementatieontwerpen.
De topologie die wordt gebruikt voor dit artikel bestaat uit twee border-routers die beide zijn geconfigureerd als externe borders en twee fusierouters die elk zijn verbonden met een border-router.
Binnen de stap van het toewijzen van apparaten een rol van Border Router terwijl het wordt toegevoegd aan de Fabric, kan een hand-off link worden gecreëerd. Bij Layer 2 is het een trunklink die is aangesloten op de Fusion Router. De volgende stappen zijn noodzakelijk:
1. Configureer een lokaal AS-nummer voor BGP. Dit AS-nummer (autonoom systeem) wordt gebruikt om het BGP-proces op de borderrouters te configureren.
2. Voeg een interface toe onder Transit. Deze interface is de directe verbinding tussen border- en fusierouter. (De 1/0/8 over Grens in dit voorbeeld.)
3. Configureer het nummer van het externe AS. Dit AS-nummer wordt gebruikt op border-routers voor buurverklaringen naar Fusion Router om externe BGP-peers (eBGP) te configureren.
4. Selecteer alle virtuele netwerken (VRF's) waarvoor VRF-doorgifte vereist is op de fusierouter.
5. Stel configuratie van Cisco Catalyst Center in op apparaten.
Gebruik dezelfde stappen voor het SDA-Border-2 apparaat.
In deze sectie wordt de verificatie van de configuratie op border-routers met betrekking tot het BGP-protocol behandeld.
SDA-Border-1
SDA-Border1#show run interface loopback 0
!
interface Loopback0
ip address 192.168.10.1 255.255.255.255
ip router isis
end
SDA-Border1#show run interface tenGigabitEthernet 1/0/8
!
interface TenGigabitEthernet1/0/8
switchport mode trunk
end
SDA-Border1#show run interface loopback 1021
interface Loopback1021
description Loopback Border
vrf forwarding Campus
ip address 172.16.10.1 255.255.255.255
end
SDA-Border1#show run interface loopback 1022
interface Loopback1022
description Loopback Border
vrf forwarding Univ
ip address 172.16.20.1 255.255.255.255
end
SDA-Border1#show run | section vrf definition Campus
vrf definition Campus
rd 1:4099
!
address-family ipv4
route-target export 1:4099
route-target import 1:4099
exit-address-family
SDA-Border1#show run | section vrf definition Univ
vrf definition Univ
rd 1:4100
!
address-family ipv4
route-target export 1:4100
route-target import 1:4100
exit-address-family
SDA-Border1#
SDA-Border1#show run interface vlan 3007
!
interface Vlan3007 <<< SVI created for BGP Peering under VRF Campus
description vrf interface to External router
vrf forwarding Campus
ip address 10.50.50.25 255.255.255.252
no ip redirects
ip route-cache same-interface
end
SDA-Border1#show run interface vlan 3006
!
interface Vlan3006 <<< SVI created for BGP Peering under VRF Univ
description vrf interface to External router
vrf forwarding Univ
ip address 10.50.50.21 255.255.255.252
no ip redirects
ip route-cache same-interface
end
SDA-Border1#show run | section bgp
router bgp 65005 <<< Local AS Number from Cisco Catalyst Center
bgp router-id interface Loopback0
bgp log-neighbor-changes
bgp graceful-restart
!
address-family ipv4
network 192.168.10.1 mask 255.255.255.255
redistribute lisp metric 10
exit-address-family
!
address-family ipv4 vrf Campus
bgp aggregate-timer 0
network 172.16.10.1 mask 255.255.255.255 <<< Anycast IP for Pool in VRF Campus
aggregate-address 172.16.10.0 255.255.255.0 summary-only <<< Only Summary is Advertised
redistribute lisp metric 10
neighbor 10.50.50.26 remote-as 65004 <<< Peer IP to be used on Fusion for VRF Campus and Remote AS Number from Cisco Catalyst Center
neighbor 10.50.50.26 update-source Vlan3007
neighbor 10.50.50.26 activate
neighbor 10.50.50.26 weight 65535 <<< Weight needed for Fusion peering to make sure locally originated path from LISP is never preferred
exit-address-family
!
address-family ipv4 vrf Univ
bgp aggregate-timer 0
network 172.16.20.1 mask 255.255.255.255 <<< Anycast IP for Pool in VRF Univ
aggregate-address 172.16.20.0 255.255.255.0 summary-only
redistribute lisp metric 10
neighbor 10.50.50.22 remote-as 65004
neighbor 10.50.50.22 update-source Vlan3006
neighbor 10.50.50.22 activate
neighbor 10.50.50.22 weight 65535
exit-address-family
SDA-Border-2
SDA-Border2#show run interface loopback 0 ! interface Loopback0 ip address 192.168.10.2 255.255.255.255 ip router isis end SDA-Border2#show run interface tenGigabitEthernet 1/0/8 ! interface TenGigabitEthernet1/0/8 switchport mode trunk end
SDA-Border2#show run interface loopback 1021
!
interface Loopback1021
description Loopback Border
vrf forwarding Campus
ip address 172.16.10.1 255.255.255.255
end
SDA-Border2#show run interface loopback 1022
!
interface Loopback1022
description Loopback Border
vrf forwarding Univ
ip address 172.16.20.1 255.255.255.255
end
SDA-Border2#show run | section vrf definition Campus vrf definition Campus rd 1:4099 ! address-family ipv4 route-target export 1:4099 route-target import 1:4099 exit-address-family SDA-Border2#show run | section vrf definition Univ vrf definition Univ rd 1:4100 ! address-family ipv4 route-target export 1:4100 route-target import 1:4100 exit-address-family SDA-Border2#show run interface vlan 3001 ! interface Vlan3001 description vrf interface to External router vrf forwarding Campus ip address 10.50.50.1 255.255.255.252 no ip redirects ip route-cache same-interface end SDA-Border2#show run interface vlan 3003 ! interface Vlan3003 description vrf interface to External router vrf forwarding Univ ip address 10.50.50.9 255.255.255.252 no ip redirects ip route-cache same-interface end SDA-Border2#show run | section bgp router bgp 65005 bgp router-id interface Loopback0 bgp log-neighbor-changes bgp graceful-restart ! address-family ipv4 network 192.168.10.2 mask 255.255.255.255 redistribute lisp metric 10 exit-address-family ! address-family ipv4 vrf Campus bgp aggregate-timer 0 network 172.16.10.1 mask 255.255.255.255 aggregate-address 172.16.10.0 255.255.255.0 summary-only redistribute lisp metric 10 neighbor 10.50.50.2 remote-as 65004 neighbor 10.50.50.2 update-source Vlan3001 neighbor 10.50.50.2 activate neighbor 10.50.50.2 weight 65535 exit-address-family ! address-family ipv4 vrf Univ bgp aggregate-timer 0 network 172.16.20.1 mask 255.255.255.255 aggregate-address 172.16.20.0 255.255.255.0 summary-only redistribute lisp metric 10 neighbor 10.50.50.10 remote-as 65004 neighbor 10.50.50.10 update-source Vlan3003 neighbor 10.50.50.10 activate neighbor 10.50.50.10 weight 65535 exit-address-family
Door de VRF-doorgifte op de fusierouter leert address-family ipv4 vrf Campus de route afkomstig uit vrf Univ (172.16.20.0/24). De bronrouter en de lerende router hebben echter hetzelfde BGP AS-nummer (65005). Om mechanismen voor het voorkomen van BGP-lussen te overwinnen en de routes op border-routers te accepteren en te installeren, moet allowas-in worden geconfigureerd voor de peerings met de fusierouter:
SDA-Border1 SDA-Border1(config)#router bgp 65005 SDA-Border1(config-router)#address-family ipv4 vrf Campus SDA-Border1(config-router-af)#neighbor 10.50.50.26 allowas-in SDA-Border1(config-router-af)#exit-address-family SDA-Border1(config-router)# SDA-Border1(config-router)#address-family ipv4 vrf Univ SDA-Border1(config-router-af)#neighbor 10.50.50.22 allowas-in SDA-Border1(config-router-af)#exit-address-family SDA-Border1(config-router)# SDA-Border2 SDA-Border2(config)#router bgp 65005 SDA-Border2(config-router)#address-family ipv4 vrf Campus SDA-Border2(config-router-af)#neighbor 10.50.50.2 allowas-in SDA-Border2(config-router-af)#exit-address-family SDA-Border2(config-router)# SDA-Border2(config-router)#address-family ipv4 vrf Univ SDA-Border2(config-router-af)#neighbor 10.50.50.10 allowas-in SDA-Border2(config-router-af)#exit-address-family SDA-Border2(config-router)#
Opmerking: Opdracht allowas-in moet worden gebruikt met voorzorg omdat het kan leiden tot loops. Als u slechts één Fusion-apparaat gebruikt waar beide Borders mee werken, is filtering nodig om ervoor te zorgen dat lokaal voortgekomen routes niet worden geaccepteerd in het AS van de Fusion-peer - binnen dezelfde VN. Als dat gebeurt, krijgt het eBGP-pad vanwege het maximale gewicht voor eBGP-paden de voorkeur boven het lokaal gegenereerde pad.
In deze sectie wordt de handmatige configuratie voor de fusierouters beschreven.
SDA-Fusion-1
Configureer de link naar de border-router als een trunk om deze af te stemmen met de VLAN-configuratie van Border-1:
interface GigabitEthernet2/8 switchport switchport trunk encapsulation dot1q switchport trunk allowed vlan 3006, 3007 switchport mode trunk end
Configureer de vereiste VRF’s:
vrf definition Campus rd 1:4099 ! address-family ipv4 route-target export 1:4099 route-target import 1:4099 exit-address-family ! vrf definition Univ rd 1:4100 ! address-family ipv4 route-target export 1:4100 route-target import 1:4100 exit-address-family
Configureer SVI-interfaces:
interface Vlan3007 vrf forwarding Campus ip address 10.50.50.26 255.255.255.252 end interface Vlan3006 vrf forwarding Univ ip address 10.50.50.22 255.255.255.252 end
Configureer eBGP-peering (externe BGP) met SDA-Border-1:
router bgp 65004 <<< Remote AS from Cisco Catalyst Center bgp log-neighbor-changes ! address-family ipv4 exit-address-family ! address-family ipv4 vrf Campus neighbor 10.50.50.25 remote-as 65005 neighbor 10.50.50.25 update-source Vlan3007 neighbor 10.50.50.25 activate exit-address-family ! address-family ipv4 vrf Univ neighbor 10.50.50.21 remote-as 65005 neighbor 10.50.50.21 update-source Vlan3006 neighbor 10.50.50.21 activate exit-address-family
Configureer iBGP-peering (interne BGP) met SDA-Fusion-2:
interface GigabitEthernet2/2 description SDA-Fusion1--->SDA-Fusion2 ip address 10.90.90.1 255.255.255.252 end router bgp 65004 neighbor 10.90.90.2 remote-as 65004 ! address-family ipv4 neighbor 10.90.90.2 activate exit-address-family !
Geef het DHCP-serversubnet door onder de globale adresfamilie waar het IP-adres van de DHCP-server 10.10.10.10 is:
interface GigabitEthernet2/35 description connection to DHCP server ip address 10.10.10.9 255.255.255.252 end router bgp 65004 ! address-family ipv4 network 10.10.10.8 mask 255.255.255.252 exit-address-family !
SDA-Fusion-2
Configureer de link naar de border-router. Als een fusie-interface L3 is in plaats van trunk, configureert u subinterfaces:
interface GigabitEthernet0/0/0.3001 encapsulation dot1Q 3001 vrf forwarding Campus ip address 10.50.50.2 255.255.255.252 end interface GigabitEthernet0/0/0.3003 encapsulation dot1Q 3003 vrf forwarding Univ ip address 10.50.50.10 255.255.255.252 end
Configureer de bijbehorende VRF's:
vrf definition Campus rd 1:4099 ! address-family ipv4 route-target export 1:4099 route-target import 1:4099 exit-address-family ! ! vrf definition Univ rd 1:4100 ! address-family ipv4 route-target export 1:4100 route-target import 1:4100 exit-address-family !
Configureer eBGP-peering met SDA-Border-2:
router bgp 65004 bgp log-neighbor-changes ! address-family ipv4 exit-address-family ! address-family ipv4 vrf Campus neighbor 10.50.50.1 remote-as 65005 neighbor 10.50.50.1 update-source GigabitEthernet0/0/0.3001 neighbor 10.50.50.1 activate exit-address-family ! address-family ipv4 vrf Univ neighbor 10.50.50.9 remote-as 65005 neighbor 10.50.50.9 update-source GigabitEthernet0/0/0.3003 neighbor 10.50.50.9 activate exit-address-family
Configureer iBGP-peering met SDA-Fusion-1:
interface GigabitEthernet0/0/2
ip address 10.90.90.2 255.255.255.252
negotiation auto
end
router bgp 65004 neighbor 10.90.90.1 remote-as 65004 ! address-family ipv4 neighbor 10.90.90.1 activate exit-address-family
De configuratie voor VRF-doorgifte is identiek voor de fusierouters SDA-Fusion-1 en SDA-Fusion-2.
Configureer eerst de VRF-lekkage tussen de twee VRF’s (Campus en Univ) en gebruik route-target import:
vrf definition Campus ! address-family ipv4
route-target export 1:4099 route-target import 1:4099
route-target import 1:4100 <<< Import VRF Univ prefixes in VRF Campus
exit-address-family
!
vrf definition Univ
!
address-family ipv4
route-target export 1:4100 route-target import 1:4100
route-target import 1:4099 <<< Import VRF Campus prefixes in VRF Univ
exit-address-family
!
Configureer vervolgens de route die lekt tussen de Global Routing Table (GRT) naar de VRF’s en van de VRF’s naar de GRT, gebruik import ... map en export ... map:
ip prefix-list Campus_Prefix seq 5 permit 172.16.10.0/24 <<< Include Prefixes belonging to VRF Campus ip prefix-list Global_Prefix seq 5 permit 10.10.10.8/30 <<< Include Prefixes belonging to Global (eq DHCP Server Subnet) ip prefix-list Univ_Prefix seq 5 permit 172.16.20.0/24 <<< Include Prefixes belonging to VRF Univ route-map Univ_Map permit 10 match ip address prefix-list Univ_Prefix route-map Global_Map permit 10 match ip address prefix-list Global_Prefix route-map Campus_Map permit 10 match ip address prefix-list Campus_Prefix vrf definition Campus ! address-family ipv4 import ipv4 unicast map Global_Map <<< Injecting Global into VRF Campus matching route-map Global_Map
export ipv4 unicast map Campus_Map <<< Injecting VRF Campus into Global matching route-map Campus_Map
exit-address-family
!
vrf definition Univ
!
address-family ipv4
import ipv4 unicast map Global_Map <<< Injecting Global into VRF Univ matching route-map Global_Map
export ipv4 unicast map Univ_Map <<< Injecting VRF Univ into Global matching route-map Univ_Map
exit-address-family
!
Deze sectie bevat controlestappen om er zeker van te zijn dat de vorige configuratie correct is uitgevoerd.
SDA-Border-1 ------Peering--------SDA-Fusion-1
SDA-Border1#show ip bgp vpnv4 vrf Campus summary Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.50.50.26 4 65004 1294 1295 32 0 0 19:32:22 2 SDA-Border1#show ip bgp vpnv4 vrf Univ summary Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.50.50.22 4 65004 1294 1292 32 0 0 19:32:57 2 -------------------------------------------------- SDA-Fusion1#show ip bgp vpnv4 vrf Campus summary Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.50.50.25 4 65005 1305 1305 31 0 0 19:41:58 1 SDA-Fusion1#show ip bgp vpnv4 vrf Univ summary Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.50.50.21 4 65005 1303 1305 31 0 0 19:42:14 1
SDA-Border-2 ------Peering--------SDA-Fusion-2
SDA-Border2#show ip bgp vpnv4 vrf Campus summary Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.50.50.2 4 65004 6 6 61 0 0 00:01:37 2 SDA-Border2#show ip bgp vpnv4 vrf Univ summary Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.50.50.10 4 65004 6 6 61 0 0 00:01:39 2 ------------------------------------------------------------------------------ SDA-Fusion2#show ip bgp vpnv4 vrf Campus summary Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.50.50.1 4 65005 17 17 9 0 0 00:11:16 1 SDA-Fusion2#show ip bgp vpnv4 vrf Univ summary Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.50.50.9 4 65005 17 17 9 0 0 00:11:33 1
SDA-Fusion-1 ------Peering--------SDA-Fusion-2
SDA-Fusion1#show ip bgp summary Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.90.90.2 4 65004 10 12 12 0 0 00:04:57 2 --------------------------------------------------------------- SDA-Fusion2#show ip bgp summary Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.90.90.1 4 65004 19 17 4 0 0 00:11:35 3
SDA-Border-1
SDA-Border1#show ip bgp vpnv4 vrf Campus Network Next Hop Metric LocPrf Weight Path Route Distinguisher: 1:4099 (default for vrf Campus) *> 10.10.10.8/30 10.50.50.26 65535 65004 i <<< Prefix leaked from Global Routing Table on Fusion *> 172.16.10.0/24 0.0.0.0 32768 i <<< VRF Campus originated prefix *> 172.16.20.0/24 10.50.50.26 65535 65004 65005 i <<< Prefix originated in VRF Univ, leaked on Fusion to VRF Campus
SDA-Border1#show ip route vrf Campus bgp Routing Table: Campus B 10.10.10.8/30 [20/0] via 10.50.50.26, 20:30:30 <<< RIB entry for DHCP Server pool prefix B 172.16.10.0/24 [200/0], 20:32:45, Null0 <<< Null entry created by "aggregate-address" BGP configuration B 172.16.20.0/24 [20/0] via 10.50.50.26, 20:32:45 <<< RIB entry for VRF Univ prefix -------------------------------------------------------------------------- SDA-Border1#show ip bgp vpnv4 vrf Univ Network Next Hop Metric LocPrf Weight Path Route Distinguisher: 1:4100 (default for vrf Univ) *> 10.10.10.8/30 10.50.50.22 65535 65004 i <<< Prefix leaked from Global Routing Table on Fusion *> 172.16.10.0/24 10.50.50.22 65535 65004 65005 i <<< Prefix originated in VRF Campus, leaked on Fusion to VRF Univ *> 172.16.20.0/24 0.0.0.0 32768 i <<< VRF Univ originated prefix SDA-Border1#show ip route vrf Univ bgp Routing Table: Univ B 10.10.10.8/30 [20/0] via 10.50.50.22, 20:31:06 <<< RIB entry for DHCP Server pool prefix B 172.16.10.0/24 [20/0] via 10.50.50.22, 20:33:21 <<< RIB entry for VRF Campus prefix B 172.16.20.0/24 [200/0], 20:33:21, Null0 <<< Null entry created by "aggregate-address" BGP configuration
SDA-Border-2
SDA-Border2#show ip bgp vpnv4 vrf Campus Network Next Hop Metric LocPrf Weight Path Route Distinguisher: 1:4099 (default for vrf Campus) *> 10.10.10.8/30 10.50.50.2 65535 65004 i <<< Prefix leaked from Global Routing Table on Fusion *> 172.16.10.0/24 0.0.0.0 32768 i <<< VRF Campus originated prefix *> 172.16.20.0/24 10.50.50.2 65535 65004 65005 i <<< Prefix originated in VRF Univ, leaked on Fusion to VRF Campus SDA-Border2#show ip route vrf Campus bgp B 10.10.10.8/30 [20/0] via 10.50.50.2, 01:02:19 <<< RIB entry for DHCP Server pool prefix B 172.16.10.0/24 [200/0], 1w6d, Null0 <<< Null entry created by "aggregate-address" BGP configuration B 172.16.20.0/24 [20/0] via 10.50.50.2, 01:02:27 <<< RIB entry for VRF Univ Prefix --------------------------------------------------------------------- SDA-Border2#show ip bgp vpnv4 vrf Univ Network Next Hop Metric LocPrf Weight Path Route Distinguisher: 1:4100 (default for vrf Univ) *> 10.10.10.8/30 10.50.50.10 65535 65004 i <<< Prefix leaked from Global Routing Table on Fusion *> 172.16.10.0/24 10.50.50.10 65535 65004 65005 i <<< Prefix originated in VRF Campus, leaked on Fusion to VRF Univ *> 172.16.20.0/24 0.0.0.0 32768 i <<< VRF Univ originated prefix SDA-Border2#show ip route vrf Univ bgp B 10.10.10.8/30 [20/0] via 10.50.50.10, 01:02:29 <<< RIB entry for DHCP Server pool prefix B 172.16.10.0/24 [20/0] via 10.50.50.10, 01:02:34 <<< RIB entry for VRF Campus prefix B 172.16.20.0/24 [200/0], 1w6d, Null0 <<< Null entry created by "aggregate-address" BGP configuration
SDA-Fusion-1
SDA-Fusion1#show ip bgp Network Next Hop Metric LocPrf Weight Path *> 10.10.10.8/30 0.0.0.0 0 32768 i <<< Locally originated Global prefix * i 172.16.10.0/24 10.50.50.1 0 100 0 65005 i <<< Prefix imported from VRF Campus *> 10.50.50.25 0 0 65005 i * i 172.16.20.0/24 10.50.50.9 0 100 0 65005 i <<< Prefix imported from VRF Univ *> 10.50.50.21 0 0 65005 i SDA-Fusion1#show ip route C 10.10.10.8/30 is directly connected, GigabitEthernet2/35 <<< Prefix for DHCP Server B 172.16.10.0 [20/0] via 10.50.50.25 (Campus), 20:50:21 <<< Prefix imported from VRF Campus B 172.16.20.0 [20/0] via 10.50.50.21 (Univ), 20:50:21 <<< Prefix imported from VRF Univ ---------------------------------------------------------------------------- SDA-Fusion1#show ip bgp vpnv4 vrf Campus Network Next Hop Metric LocPrf Weight Path Route Distinguisher: 1:4099 (default for vrf Campus) Import Map: Global_Map, Address-Family: IPv4 Unicast, Pfx Count/Limit: 1/1000 Export Map: Campus_Map, Address-Family: IPv4 Unicast, Pfx Count/Limit: 1/1000 *> 10.10.10.8/30 0.0.0.0 0 32768 i <<< Prefix imported from Global Routing *> 172.16.10.0/24 10.50.50.25 0 0 65005 i <<< Prefix learnt from Border1 in VRF Campus *> 172.16.20.0/24 10.50.50.21 0 0 65005 i <<< Prefix imported fron VRF Univ
SDA-Fusion1#show ip bgp vpnv4 vrf Campus 172.16.20.0/24
BGP routing table entry for 1:4099:172.16.20.0/24, version 27
Paths: (1 available, best #1, table Campus)
Advertised to update-groups:
5
Refresh Epoch 1
65005, (aggregated by 65005 192.168.10.1), imported path from 1:4100:172.16.20.0/24 (Univ)
10.50.50.21 (via vrf Univ) (via Univ) from 10.50.50.21 (192.168.10.1)
Origin IGP, metric 0, localpref 100, valid, external, atomic-aggregate, best
Extended Community: RT:1:4100
rx pathid: 0, tx pathid: 0x0
SDA-Fusion1#show ip route vrf Campus bgp B 10.10.10.8/30 is directly connected, 20:46:51, GigabitEthernet2/35 B 172.16.10.0 [20/0] via 10.50.50.25, 20:50:07 B 172.16.20.0 [20/0] via 10.50.50.21 (Univ), 20:50:07 ---------------------------------------------------------------------------- SDA-Fusion1#show ip bgp vpnv4 vrf Univ Network Next Hop Metric LocPrf Weight Path Route Distinguisher: 1:4100 (default for vrf Univ) Import Map: Global_Map, Address-Family: IPv4 Unicast, Pfx Count/Limit: 1/1000 Export Map: Univ_Map, Address-Family: IPv4 Unicast, Pfx Count/Limit: 1/1000 *> 10.10.10.8/30 0.0.0.0 0 32768 i <<< Prefix imported from Global Routing *> 172.16.10.0/24 10.50.50.25 0 0 65005 i <<< Prefix imported fron VRF Campus *> 172.16.20.0/24 10.50.50.21 0 0 65005 i <<< Prefix learnt from Border1 in VRF Univ
SDA-Fusion1#show ip bgp vpnv4 vrf Univ 172.16.10.0/24
BGP routing table entry for 1:4100:172.16.10.0/24, version 25
Paths: (1 available, best #1, table Univ)
Advertised to update-groups:
4
Refresh Epoch 1
65005, (aggregated by 65005 192.168.10.1), imported path from 1:4099:172.16.10.0/24 (Campus)
10.50.50.25 (via vrf Campus) (via Campus) from 10.50.50.25 (192.168.10.1)
Origin IGP, metric 0, localpref 100, valid, external, atomic-aggregate, best
Extended Community: RT:1:4099
rx pathid: 0, tx pathid: 0x0
SDA-Fusion1#show ip route vrf Univ bgp B 10.10.10.8/30 is directly connected, 20:47:01, GigabitEthernet2/35 B 172.16.10.0 [20/0] via 10.50.50.25 (Campus), 20:50:17 B 172.16.20.0 [20/0] via 10.50.50.21, 20:50:17
SDA-Fusion-2
SDA-Fusion2#show ip bgp Network Next Hop Metric LocPrf Weight Path *>i 10.10.10.8/30 10.90.90.1 0 100 0 i *> 172.16.10.0/24 10.50.50.1 0 0 65005 i * i 10.50.50.25 0 100 0 65005 i *> 172.16.20.0/24 10.50.50.9 0 0 65005 i * i 10.50.50.21 0 100 0 65005 i SDA-Fusion2#show ip route B 10.10.10.8/30 [200/0] via 10.90.90.1, 01:25:56 B 172.16.10.0 [20/0] via 10.50.50.1 (Campus), 01:25:56 B 172.16.20.0 [20/0] via 10.50.50.9 (Univ), 01:25:56 ------------------------------------------------------------------------------ SDA-Fusion2#show ip bgp vpnv4 vrf Campus Network Next Hop Metric LocPrf Weight Path Route Distinguisher: 1:4099 (default for vrf Campus) Import Map: Global_Map, Address-Family: IPv4 Unicast, Pfx Count/Limit: 1/1000 Export Map: Campus_Map, Address-Family: IPv4 Unicast, Pfx Count/Limit: 1/1000 *>i 10.10.10.8/30 10.90.90.1 0 100 0 i *> 172.16.10.0/24 10.50.50.1 0 0 65005 i *> 172.16.20.0/24 10.50.50.9 0 0 65005 i SDA-Fusion2#show ip route vrf Campus bgp B 10.10.10.8/30 [200/0] via 10.90.90.1, 01:26:09 B 172.16.10.0 [20/0] via 10.50.50.1, 01:26:13 B 172.16.20.0 [20/0] via 10.50.50.9 (Univ), 01:26:13 ------------------------------------------------------------------------------- SDA-Fusion2#show ip bgp vpnv4 vrf Univ Network Next Hop Metric LocPrf Weight Path Route Distinguisher: 1:4100 (default for vrf Univ) Import Map: Global_Map, Address-Family: IPv4 Unicast, Pfx Count/Limit: 1/1000 Export Map: Univ_Map, Address-Family: IPv4 Unicast, Pfx Count/Limit: 1/1000 *>i 10.10.10.8/30 10.90.90.1 0 100 0 i *> 172.16.10.0/24 10.50.50.1 0 0 65005 i *> 172.16.20.0/24 10.50.50.9 0 0 65005 i SDA-Fusion2#show ip route vrf Univ bgp B 10.10.10.8/30 [200/0] via 10.90.90.1, 01:26:19 B 172.16.10.0 [20/0] via 10.50.50.1 (Campus), 01:26:23 B 172.16.20.0 [20/0] via 10.50.50.9, 01:26:23
Voor redundantie tussen de PETR's wanneer een externe link aan de grens mislukt, moet u voor de externe en de externe+interne grenzen iBGP-sessies tussen de twee randen voor elk van de VPN's handmatig bouwen. Bovendien zijn in het geval van de Externe+Interne grens waar BGP wordt ingevoerd in LISP en LISP terug in BGP wordt herverdeeld, markeringen nodig om iBGP te verhinderen aan LISP routeinvoer en zo potentiële loops te vermijden.
interface Vlan31
description vrf interface to SDA-Border-2
vrf forwarding Campus
ip address 10.31.1.1 255.255.255.252
!
interface Vlan33
description vrf interface to SDA-Border-2
vrf forwarding Univ
ip address 10.33.1.1 255.255.255.252
!
router bgp 65005
!
address-family ipv4 vrf Campus
redistribute lisp metric 10 <<< open redistribution pushed by Cisco Catalyst Center
neighbor 10.31.1.2 remote-as 65005 <<< iBGP peering with SDA-Border-2
neighbor 10.31.1.2 activate
neighbor 10.31.1.2 send-community <<< we need to send community/tag to the neighbor
neighbor 10.31.1.2 route-map tag_local_eids out <<< route-map used to tag prefixes sent out
!
address-family ipv4 vrf Univ
redistribute lisp metric 10
neighbor 10.33.1.2 remote-as 65005
neighbor 10.33.1.2 activate
neighbor 10.33.1.2 send-community
neighbor 10.33.1.2 route-map tag_local_eids out
!
router lisp
!
instance-id 4099
service ipv4
eid-table vrf Campus
route-import database bgp 65005 route-map DENY-Campus locator-set rloc_a0602921-91eb-4e27-a294-f88949a1ca37 <<< pushed if Border is (also) Internal
!
instance-id 4103
service ipv4
eid-table vrf Univ
route-import database bgp 65005 route-map DENY-Univ locator-set rloc_a0602921-91eb-4e27-a294-f88949a1ca37
!
ip community-list 1 permit 655370 <<< community-list matching tag 655370 - pushed by Cisco Catalyst Center
!
route-map DENY-Campus deny 5 <<< route-map pushed and used in route-import
match ip address prefix-list Campus
!
route-map DENY-Campus deny 10
match ip address prefix-list l3handoff-prefixes
!
route-map DENY-Campus deny 15
match community 1 <<< match on community-list 1 to deny iBGP prefixes to be imported into LISP
!
route-map DENY-Campus deny 25
match ip address prefix-list deny_0.0.0.0
!
route-map DENY-Campus permit 30
!
route-map DENY-Univ deny 5 <<< similar route-map is pushed for Univ VN
match ip address prefix-list Univ
!
route-map DENY-Univ deny 10
match ip address prefix-list l3handoff-prefixes
!
route-map DENY-Univ deny 15
match community 1
!
route-map DENY-Univ deny 25
match ip address prefix-list deny_0.0.0.0
!
route-map DENY-Univ permit 30
!
route-map tag_local_eids permit 5 <<< route-map we need to create in order to tag the routes advertised to the iBGP peer
set community 655370 <<< setting community/tag to 655370
!
interface Vlan31
description vrf interface to SDA-Border-1
vrf forwarding Campus
ip address 10.31.1.2 255.255.255.252
!
interface Vlan33
description vrf interface to SDA-Border-1
vrf forwarding Univ
ip address 10.33.1.2 255.255.255.252
!
router bgp 65005
!
address-family ipv4 vrf Campus
neighbor 10.31.1.1 remote-as 65005
neighbor 10.31.1.1 activate
neighbor 10.31.1.1 send-community
neighbor 10.31.1.1 route-map tag_local_eids out
!
address-family ipv4 vrf Univ
neighbor 10.33.1.1 remote-as 65005
neighbor 10.33.1.1 activate
neighbor 10.33.1.1 send-community
neighbor 10.33.1.1 route-map tag_local_eids out
!
router lisp
!
instance-id 4099
service ipv4
eid-table vrf Campus
route-import database bgp 65005 route-map DENY-Campus locator-set rloc_677c0a8a-0802-49f9-99cc-f9c6ebda80f3 <<< pushed
!
instance-id 4103
service ipv4
eid-table vrf Univ
route-import database bgp 65005 route-map DENY-Univ locator-set rloc_677c0a8a-0802-49f9-99cc-f9c6ebda80f3
!
ip community-list 1 permit 655370
!
route-map DENY-Campus deny 5
match ip address prefix-list Campus
!
route-map DENY-Campus deny 10
match ip address prefix-list l3handoff-prefixes
!
route-map DENY-Campus deny 15
match community 1
!
route-map DENY-Campus deny 25
match ip address prefix-list deny_0.0.0.0
!
route-map DENY-Campus permit 30
!
route-map DENY-Univ deny 5
match ip address prefix-list Univ
!
route-map DENY-Univ deny 10
match ip address prefix-list l3handoff-prefixes
!
route-map DENY-Univ deny 15
match community 1
!
route-map DENY-Univ deny 25
match ip address prefix-list deny_0.0.0.0
!
route-map DENY-Univ permit 30
!
route-map tag_local_eids permit 5
set community 655370
!
Deze sectie bevat configuratievoorbeelden voor fusiesjablonen om de configuratie te vereenvoudigen.
Vervolgens zijn de Variabelen die moeten worden gedefinieerd op basis van uw implementatieontwerp. In dit voorbeeld zijn de configuraties en VPN’s gebaseerd op de vorige topologie die twee VPN’s heeft, Campus en Univ.
interface_Fusion1: GigabitEthernet2/8
interface_Fusion2: GigabitEthernet0/0/0
Global_prefixes = 10.10.10.8/30
FUSION_BGP_AS = 65004
BORDER_BGP_AS = 65005
Voor VN1:
VN1 = Campus
Fusion1_VN1_VLAN = 3007
Fusion2_VN1_VLAN = 3001
VN1_prefixes = 172.16.10.0/24
Fusion1_VN1_IP = 10.50.50.26
Fusion1_VN1_MASK = 255.255.255.252
Fusion2_VN1_IP = 10.50.50.2
Fusion2_VN1_MASK = 255.255.255.252
VN1_RD = 4099
VN1_ border1_neighbor_IP = 10.50.50.25
VN1_border2_neighbor_IP = 10.50.50.1
Voor VN2:
VN2 = Univ
Fusion1_VN2_VLAN = 3006
Fusion2_VN2_VLAN = 3003
VN2_prefixes = 172.16.20.0/24
Fusion1_VN2_IP = 10.50.50.22
Fusion1_VN2_MASK = 255.255.255.252
Fusino2_VN2_IP2 = 10.50.50.10
Fusion2_VN2_MASK = 255.255.255.252
VN2_RD = 4100
VN2_border1_neighbor_IP = 10.50.50.21
VN2_border2_neighbor_IP = 10.50.50.9
interface $interface_Fusion1
switchport
switchport mode trunk
switchport trunk allowed vlan add $Fusion1_VN1_VLAN, $Fusion1_VN2_VLAN
!
vlan $Fusion1_VN1_VLAN
no shut
!
vlan $Fusion1_VN2_VLAN
no shut
!
vrf definition $VN1
rd 1:$VN1_RD
!
address-family ipv4
route-target export 1:$VN1_RD
route-target import 1:$VN1_RD
route-target import 1:$VN2_RD
exit-address-family
!
vrf definition $VN2
rd 1:$VN2_RD
!
address-family ipv4
route-target export 1:$VN2_RD
route-target import 1:$VN2_RD
route-target import 1:$VN1_RD
exit-address-family
!
interface Vlan $Fusion1_VN1_VLAN
vrf forwarding $VN1
ip address $Fusion1_VN1_IP $Fusion1_VN1_MASK
!
interface Vlan $Fusion1_VN2_VLAN
vrf forwarding $VN2
ip address $Fusion1_VN2_IP $Fusion1_VN2_MASK
!
router bgp $FUSION_BGP_AS
bgp log-neighbor-changes
!
address-family ipv4
exit-address-family
!
address-family ipv4 vrf $VN1
neighbor $VN1_border1_neighbor_IP remote-as $BORDER_BGP_AS
neighbor $VN1_border1_neighbor_IP update-source Vlan $Fusion1_VN1_VLAN
neighbor $VN1_border1_neighbor_IP activate
exit-address-family
!
address-family ipv4 vrf $VN2
neighbor $VN2_border1_neighbor_IP remote-as $BORDER_BGP_AS
neighbor $VN2_border1_neighbor_IP update-source $Fusion1_VN2_VLAN
neighbor $VN2_border1_neighbor_IP activate
exit-address-family
ip prefix-list ${VN1}_Prefix seq 5 permit $VN1_prefixes
ip prefix-list Global_Prefix seq 5 permit $Global_prefixes
ip prefix-list ${VN2}_Prefix seq 5 permit $VN2_prefixes
route-map ${VN2}_Map permit 10
match ip address prefix-list ${VN2}_Prefix
route-map Global_Map permit 10
match ip address prefix-list Global_Prefix
route-map ${VN1}_Map permit 10
match ip address prefix-list ${VN1}_Prefix
vrf definition $VN1
!
address-family ipv4
import ipv4 unicast map Global_Map
export ipv4 unicast map ${VN1}_Map
exit-address-family
!
vrf definition $VN2
!
address-family ipv4
import ipv4 unicast map Global_Map
export ipv4 unicast map ${VN2}_Map
exit-address-family
!
interface $interface_Fusion2.$Fusion2_VN1_VLAN
encapsulation dot1Q $Fusion2_VN1_VLAN
vrf forwarding $VN1
ip address $Fusion2_VN1_IP2 $Fusion2_VN1_MASK
!
interface $interface_Fusion2.$Fusion2_VN2_VLAN
encapsulation dot1Q $Fusion2_VN2_VLAN
vrf forwarding $VN2
ip address $Fusion2_VN2_IP2 $Fusion2_VN2_MASK
!
vlan $Fusion2_VN1_VLAN
no shut
!
vlan $Fusion2_VN2_VLAN
no shut
!
vrf definition $VN1
rd 1:$VN1_RD
!
address-family ipv4
route-target export 1:$VN1_RD
route-target import 1:$VN1_RD
route-target import 1:$VN2_RD
exit-address-family
!
vrf definition $VN2
rd 1:$VN2_RD
!
address-family ipv4
route-target export 1:$VN2_RD
route-target import 1:$VN2_RD
route-target import 1:$VN1_RD
exit-address-family
!
router bgp $FUSION_BGP_AS
bgp log-neighbor-changes
!
address-family ipv4
exit-address-family
!
address-family ipv4 vrf $VN1
neighbor $VN1_border2_neighbor_IP remote-as $BORDER_BGP_AS
neighbor $VN1_border2_neighbor_IP update-source $interface_Fusion2.$Fusion2_VN1_VLAN
neighbor $VN1_bordre2_neighbor_IP activate
exit-address-family
!
address-family ipv4 vrf $VN2
neighbor $VN2_border2_neighbor_IP remote-as $BORDER_BGP_AS
neighbor $VN2_border2_neighbor_IP update-source $interface_Fusion2.$Fusion2_VN2_VLAN
neighbor $VN2_border2_neighbor_IP activate
exit-address-family
ip prefix-list ${VN1}_Prefix seq 5 permit $VN1_prefixes
ip prefix-list Global_Prefix seq 5 permit $Global_prefixes
ip prefix-list ${VN2}_Prefix seq 5 permit $VN2_prefixes
route-map ${VN2}_Map permit 10
match ip address prefix-list ${VN2}_Prefix
route-map Global_Map permit 10
match ip address prefix-list Global_Prefix
route-map ${VN}_Map permit 10
match ip address prefix-list ${VN1}_Prefix
vrf definition $VN1
!
address-family ipv4
import ipv4 unicast map Global_Map
export ipv4 unicast map ${VN1}_Map
exit-address-family
!
vrf definition $VN2
!
address-family ipv4
import ipv4 unicast map Global_Map
export ipv4 unicast map ${VN2}_Map
exit-address-family
!
End
Revisie | Publicatiedatum | Opmerkingen |
---|---|---|
4.0 |
04-Mar-2024 |
Bijgewerkte branding vereisten en opmaak. |
3.0 |
20-Dec-2022 |
Toegevoegd Alt Text.
Bijgewerkte Inleiding, Rondes, Stijl Vereisten en het Opmaken. |
1.0 |
27-Jul-2018 |
Eerste vrijgave |