DHCP Discover パケット 9372-1 は DHCP サーバに送信されています。
giaddr は 10.11.11.11(loopback1)に設定され、それに応じてサブオプション 5/11/151 を設定します。
Bootstrap Protocol
Message type: Boot Request (1)
Hardware type: Ethernet (0x01)
Hardware address length: 6
Hops: 1
Transaction ID: 0x0860cd13
Seconds elapsed: O
Bootp flags: 0x0000 (unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 0.0.0.0 (0.0.0.0)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent iP address: 10.11.11.11 (10.11.11.11)
Client MAC address: Hughes_01:51:51 (00:00:10:01:51:51)
Client hardware address padding: 00000000000000000000
Server host name not given
Boot file name not given
Magic cookie: DHCP
Option: (53) DHCP Message Type
Length: 1
DHCP: Discover (1)
Option: (55) Parameter Request List
Option: (61) Client Identifier
Option: (82) Agent Information Option
Length: 47
Option 82 suboption: (1) Aqent Circuit ID
Option 82 suboption: (151) Agent Remote ID
Option 82 suboption: (11) Server ID Override
Length: 4
Server ID override: 172.16.16.1 (172.16.16.1)
Option 82 suboption: (5) Link selection
Length: 4
Link selection: 172.16.16.0 (172.16.16.0)
ASR1K-DHCP# sh ip dhcp bin
Bindings from all pools not associated with VRF:
IP address ClientID/Lease expiration Type State Interface
Hardware address/
User name
Bindings from VRF pool vxlan-900001:
IP address ClientID/Lease expiration Type State Interface
Hardware address/
User name
172.16.16.10 0100.0010.0175.75 Aug 25 2018 10:02 AM Automatic Active GigabitEthernet2/1/0
172.16.16.11 0100.0010.0151.51 Aug 25 2018 09:50 AM Automatic Active GigabitEthernet2/1/0
9372-1# sh ip route vrf vxlan-900001
IP Route Table for VRF "vxlan-900001"
'*' denotes best ucast nexthop
'**' denotes best mcast nexthop
'[x/y]' denotes [preference/metric]
'%<string>' in via output denotes VRF <string>
10.11.11.11/8, ubest/mbest: 2/0, attached
*via 10.11.11.11, Lo1, [0/0], 19:13:56, local
*via 10.11.11.11, Lo1, [0/0], 19:13:56, direct
10.22.22.22/8, ubest/mbest: 1/0
*via 2.2.2.2%default, [200/0], 19:13:56, bgp65535,internal, tag 65535 (evpn)segid: 900001 tunnelid: 0x2020202
encap: VXLAN
172.16.16.0/20, ubest/mbest: 1/0, attached
*via 172.16.16.1, Vlan1001, [0/0], 19:13:56, direct
172.16.16.1/32, ubest/mbest: 1/0, attached
*via 172.16.16.1, Vlan1001, [0/0], 19:13:56, local
172.16.16.10/32, ubest/mbest: 1/0
*via 2.2.2.2%default, [200/0], 00:01:27, bgp65535,
internal, tag 65535 (evpn)segid: 900001 tunnelid: 0x2020202
encap: VXLAN
172.16.16.11/32, ubest/mbest: 1/0, attached
*via 172.16.16.11, Vlan1001, [190/0], 00:13:56, hmm
192.0.2.20/24, ubest/mbest: 1/0, attached
*via 192.0.2.25, Vlan10, [0/0], 00:36:08, direct
192.0.2.25/24, ubest/mbest: 1/0, attached
*via 192.0.2.25, Vlan10, [0/0], 00:36:08, local
9372-1# ping 172.16.16.10 vrf vxlan-900001 cou 1
PING 172.16.16.10 (172.16.16.10): 56 data bytes
64 bytes from 172.16.16.10: icmp_seq=0 ttl=62 time=0.808 ms
- 172.16.16.10 ping statistics -
1 packets transmitted, 1 packets received, 0.00% packet loss
round-trip min/avg/max = 0.808/0.808/0.808 ms
9372-1# ping 172.16.16.11 vrf vxlan-900001 cou 1
PING 172.16.16.11 (172.16.16.11): 56 data bytes
64 bytes from 172.16.16.11: icmp_seq=0 ttl=63 time=0.872 ms
- 172.16.16.11 ping statistics -
1 packets transmitted, 1 packets received, 0.00% packet loss
round-trip min/avg/max = 0.872/0.871/0.872 ms