QoS on Ethernet over GRE Tunnels

The QoS on Ethernet over GRE (EoGRE) Tunnels feature enables service providers to configure one common Quality of Service (QoS) policy for all endpoints, where an end-point can be a customer premise equipment (CPE) or a VLAN on a CPE. This feature supports high availability on a route processor.

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Information About QoS on Ethernet over GRE Tunnels

EoGRE Downstream QoS

The Quality of Service (QoS) on Ethernet over GRE (EoGRE) Tunnels feature enables service providers to apply a unified QoS policy on all endpoints of a tunnel. This controls the bandwidth that public subscribers can download and ensures maximum bandwidth for private customers.

In the deployment scenario given in the figure below, the total available WAN bandwidth at the customer premise equipment (CPE) is 10 Mbps, of which public users are allowed 2 Mbps and the remaining bandwidth is available for private users.

Figure 1. EoGRE Downstream QoS Use Case

Single SSID

Mobile nodes connect to wireless access points (APs). These APs have Service Set Identifiers (SSIDs) provided by the service provider. The SSID of a customer premise equipment (CPE) is the VLAN identifier. Service providers can provide more than one public SSID at a CPE. If a CPE has more than one SSID, then additional mGRE tunnels are configured with a corresponding VLAN tag. The configured multipoint generic routing encapsulation (mGRE) tunnels learn about remote subscribers and the corresponding CPEs independently. This ensures that VLANs, their subnets, default gateways, and VRFs are kept separate and independent of each other, and any QoS policy that is configured on each endpoint of these tunnels also applies to the traffic from the VLAN on the CPE.

Figure 2. Separate Tunnels for Each SSID

Multiple SSIDs

In a single tunnel for a multiple Service Set Identifiers (SSID), service providers can configure a VLAN range on the multipoint generic routing encapsulation (mGRE) tunnel. When a subscriber traffic is received, the traffic is matched according to the tunnel source and the VLAN range. The Ethernet over GRE (EoGRE) control process also learns the MAC address of subscribers and the VLAN tag of the CPE from which the traffic is originating.


Note

You cannot change a VLAN configuration if any subscriber session or MAC address is already learned in the EoGRE control process. To change the VLAN configurations, you must clear all subscriber sessions.

In the figure below, all endpoints learned on Tunnel-1 represent a CPE and a Quality of Service (QoS) policy applied on this tunnel endpoint applies to all traffic going towards the CPE irrespective of the VLAN.

Figure 3. Single Tunnel for Multiple SSIDs

How to Configure QoS on Ethernet over GRE Tunnels

Configuring Downstream QoS Policy on Ethernet over GRE Tunnels

Before you begin

Create a Quality of Service (QoS) policy map to attach to the Ethernet over GRE (EoGRE) tunnel.


Note

How to create a QoS policy map is not described in the following task.

SUMMARY STEPS

  1. enable
  2. configure terminal
  3. interface tunnel tunnel-number
  4. interface source {ip-address | ipv6-address | interface-type interface-number}
  5. tunnel vlan vlan-id
  6. ip address ip-address mask
  7. tunnel mode ethernet gre {ipv4 | ipv6}
  8. tunnel endpoint service-policy output policy-map-name
  9. ip subscriber l2-connected
  10. initiator unclassified mac-address
  11. initiator dhcp
  12. end

DETAILED STEPS

  Command or Action Purpose
Step 1

enable

Example:

Device> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.
Step 2

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 3

interface tunnel tunnel-number

Example:

Device(config)# interface tunnel 1

Specifies a tunnel interface and number and enters interface configuration mode.

Step 4

interface source {ip-address | ipv6-address | interface-type interface-number}

Example:

Device(config-if)# tunnel source loopback 2

Sets the source address of a tunnel interface.

Step 5

tunnel vlan vlan-id

Example:

Device(config-if)# tunnel vlan 10, 20

Associates a VLAN identifier with the Ethernet over GRE tunnel.

Step 6

ip address ip-address mask

Example:

Device(config-if)# ip address 192.168.4.3 255.255.255.0

Specifies the IP address and mask of the mobile node.

Step 7

tunnel mode ethernet gre {ipv4 | ipv6}

Example:

Device(config-if)# tunnel mode ethernet gre ipv4

Sets the encapsulation mode of the tunnel to Ethernet over GRE IPv4 or GRE IPv6.

Step 8

tunnel endpoint service-policy output policy-map-name

Example:

Device(config-if)# tunnel endpoint service-policy output tunnel-qos-policy

Configures the QoS policy for tunnel endpoints.

Step 9

ip subscriber l2-connected

Example:

Device(config-if)# ip subscriber l2-connected

Enters IP subscriber configuration mode.

Step 10

initiator unclassified mac-address

Example:

Device(config-subscriber)# initiator unclassified mac-address

Initiates IP sessions from unclassified MAC address.

Step 11

initiator dhcp

Example:

Device(config-subscriber)# initiator dhcp

Enables IP sessions initiated by DHCP.

Step 12

end

Example:

Device(config-subscriber)# end

Exits to global configuration mode.

Verifying QoS on Ethernet over GRE Tunnels

The show commands can be entered in any order.

Before you begin

Configure QoS on Ethernet over GRE (EoGRE) tunnel.

SUMMARY STEPS

  1. show interface tunnel tunnel-interface
  2. show tunnel endpoints tunnel tunnel-interface
  3. show tunnel mac-table tunnel tunnel-interface
  4. show policy-map multipoint tunnel tunnel-interface

DETAILED STEPS

Step 1

show interface tunnel tunnel-interface

This command displays information about the tunnel.

Example:

Device# show interface tunnel 1

Tunnel1 is up, line protocol is up
Hardware is Tunnel
Internet address is 11.1.1.1/24
MTU 17846 bytes, BW 100 Kbit/sec, DLY 50000 usec, reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 10.0.0.1
Tunnel MAC address 0000.5e00.5213
Tunnel Vlan-id 1
Tunnel protocol/transport Ethernet-GRE/IP Key 0x1, sequencing disabled Checksumming of packets disabled
Tunnel TTL 255
Tunnel transport MTU 1454 bytes
Tunnel transmit bandwidth 8000 (kbps) Tunnel receive bandwidth 8000 (kbps)
Last input 00:48:08, output never, output hang never
Last clearing of "show interface" counters 00:48:26
Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 107
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1867 packets input, 161070 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
43 packets output, 4386 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out ind-uut#
--- 22:03:51 ---
44: 2013-01-30T22:03:51: %SCRIPT-6-INFO: {_haExecCmd: Executing cmd exec with ind-uut-a}


Device# show interface tunnel 2

Tunnel2 is up, line protocol is up
Hardware is Tunnel
Internet address is 10.1.1.1/24
MTU 1434 bytes, BW 100 Kbit/sec, DLY 50000 usec, reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 10::1
Tunnel MAC address 0000.5e00.5213
Tunnel Vlan-id 2
Tunnel protocol/transport Ethernet-GRE/IPv6
Key 0x2, sequencing disabled
Checksumming of packets disabled
Tunnel TTL 255
Path MTU Discovery, ager 10 mins, min MTU 1280
Tunnel transport MTU 1434 bytes
Tunnel transmit bandwidth 8000 (kbps) Tunnel receive bandwidth 8000 (kbps)
Last input never, output never, output hang never
Last clearing of "show interface" counters 00:48:28
Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 106
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
Step 2

show tunnel endpoints tunnel tunnel-interface

This command displays tunnel interface endpoints and verifies if the tunnel is created correctly.

Example:

Device# show tunnel endpoints tunnel

Tunnel0 running in Ethernet-GRE/IP mode

Endpoint transport 10.1.1.1 Refcount 3 Base 0x2A98DD03C0 Create Time 3d02h
   overlay 10.1.1.1 Refcount 2 Parent 0x2A98DD03C0 Create Time 3d02h
 Endpoint transport 3.3.3.3 Refcount 3 Base 0x2A98DD0300 Create Time 3d02h
   overlay 10.1.1.3 Refcount 2 Parent 0x2A98DD0300 Create Time 3d02h
Step 3

show tunnel mac-table tunnel tunnel-interface

This command displays MAC table entries that are associated with a tunnel.

Example:

Device# show tunnel mac-table tunnel0

overlay-address 30.0.0.21, transport-address 192.168.0.50
mac-address 0000.1200.0001, vlan 400 Mac Age 3d06h

overlay-address 60.0.0.8, transport-address 120.0.40.2
mac-address 3010.e495.b058, vlan 10 Mac Age 00:01:00
Step 4

show policy-map multipoint tunnel tunnel-interface

This command displays the policy-map that is associated with a tunnel.

Example:

Device> show policy-map multipoint tunnel 1

Interface Tunnel 1 <--> 1.1.1.1
  Service-policy output: test
    Class-map: class-default (match-any)
      0 packets, 0 bytes
      5 minute offered rate 0000 bps, drop rate 0000 bps
      Match: any
      police:rate 300000 bps, burst 17898 bytes
      conformed 0 packets, 0 bytes;actions:transmit 
      exceeded 0 packets, 0 bytes; actions:drop
        conformed 0000 bps, exceeded 0000 bps

Configuration Examples for QoS on Ethernet over GRE Tunnels

Example: QoS on Ethernet over GRE Tunnels

Configuring Ethernet over GRE (EoGRE) on the mobile node. 

! configure the topology
mobile-node1(config-if)# interface GigabitEthernet0/1
mobile-node1(config-if)# ip address 10.21.1.1 255.255.255.0
mobile-node1(config-if)# no shutdown
mobile-node1(config-if)# exit
mobile-node1(config)# ip route 10.0.0.1 255.255.255.255 10.21.1.2

! Configure the interface used as the source of the tunnel
mobile-node1(config)# interface Loopback0
mobile-node1(config-if)# ip address 10.40.0.1 255.255.255.0 
mobile-node1(config-if)# ipv6 address 2001:db8:2:40::1/64
mobile-node1(config-if)# no shutdown

! Configure the Ethernet over GRE IPv4 Tunnel
mobile-node1(config-if)# interface Tunnel1
mobile-node1(config-if)# mac-address 0000.0000.0001
mobile-node1(config-if)# ip dhcp client client-id ascii MN1@cisco.com 
mobile-node1(config-if)# ip address dhcp
mobile-node1(config-if)# no ip redirects 
mobile-node1(config-if)# no ip route-cache
mobile-node1(config-if)# tunnel source Loopback0
mobile-node1(config-if)# tunnel mode ethernet gre ipv4 
mobile-node1(config-if)# tunnel key 1 
mobile-node1(config-if)# tunnel vlan 10, 20
mobile-node1(config-if)# no shutdown
mobile-node1(config-if)# exit

Configuring Ethernet over GRE tunnel on the MAG

! Configure the topology
MAG(config)# interface FastEthernet1/1/5
MAG(config-if)# ip address 10.21.1.2 255.255.255.0 
MAG(config-if)# ipv6 address 2001:db8:2:21::2/64
MAG(config-if)# no shutdown
MAG(config)# ip route 10.40.0.1 255.255.255.255 10.21.1.1

! Configure the interface used as source of the tunnel
MAG(config-if)# interface Loopback0
MAG(config-if)# ip address 10.0.0.1 255.255.255.0 
MAG(config-if)# no shutdown

! configure the policy map
MAG(config)# policy-map tunnel-qos-policy
MAG(config-pmap)# class class-default
MAG(config-pmap-c)# police rate 200000 bps
MAG(config-pmap-c)# exit

! Configure the Ethernet over GRE IPv4 Tunnel
MAG(config)# interface Tunnel1
MAG(config-if)# ip address 10.11.1.1 255.255.255.0 
MAG(config-if)# tunnel mode ethernet gre ipv4
MAG(config-if)# tunnel source Loopback0

! Configure a static GRE and VLAN ID for the tunnel
MAG(config-if)# tunnel key 1
MAG(config-if)# tunnel vlan 10, 20
 
!Associate the QoS policy to the tunnel interface
MAG(config-if)# tunnel endpoint service-policy output tunnel-qos-policy

! Enable ISG on the tunnel
MAG(config-if)# ip subscriber l2-connected
MAG(config-subscriber)# initiator unclassified mac-address
MAG(config-subscriber)# initiator dhcp
MAG(config-subscriber)# exit

Additional References for QoS on Ethernet over GRE Tunnels

Related Documents

Related Topic

Document Title

Cisco IOS commands

Cisco IOS Master Command List, All Releases

Ethernet over GRE Tunnels

Cisco IOS Interface and Hardware Component Configuration Guide

Tunnel commands: complete command syntax, command mode, defaults, command history, usage guidelines, and examples

Interface and Hardware Component Command Reference

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Feature Information for QoS on Ethernet over GRE Tunnels

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Table 1. Feature Information for QoS on Ethernet over GRE Tunnels

Feature Name

Releases

Feature Information

QoS on Ethernet over GRE Tunnels

Cisco IOS XE 3.13S

The QoS on Ethernet over GRE (EoGRE) Tunnels feature enables service providers to configure a common QoS policy for all endpoints. This feature supports dual high availability for a route processor.

The following command was introduced by this feature: tunnel endpoint service-policy output .