Avaya G430, Manual

Page: 295 / 696

traffic based on configured characteristics of the traffic. Thus, PBR can be used in combination
with object tracking to configure a backup mechanism for interfaces.
For an example that uses policy-based routing as an alternative to the
backup interface
command, replace the last four lines of the previous typical application with the example below.
The example creates a next hop list that sends the specified traffic to the WAN FastEthernet
interface that is running PPPoE encapsulation. If the WAN FastEthernet interface becomes
unavailable, the next hop list routes the traffic to a VLAN interface used to connect the Branch
Gateway to an external router. PBR list 801 is created and assigned to interface VLAN 1, so
that traffic defined in PBR list 801 passing through interface VLAN 1 is routed according to the
next hop list.
Note:
You can define a static route over the WAN FastEthernet interface running DHCP client. In
such a case, the static route uses as the next hop the default router learned from the DHCP
server. This is useful for GRE tunnels which are defined over the WAN Fast Ethernet running
DHCP client. It is necessary to define static routes in order to prevent loops. Therefore, the
IP route command allows configuration of static routes over WAN Fast Ethernet running
DHCP client.
When the WAN Fast Ethernet is up, policy-based routing routes this traffic via the WAN
FastEthernet interface. When the track list defined in the previous typical application is down,
policy-based routing routes this traffic through the VLAN interface used to connect the Branch
Gateway to an external router. When the track list is up again, the traffic is again routed through
the WAN FastEthernet interface.
! Create PBR list 801. This list routes traffic from IP address
! 149.49.42.1 to IP address 149.49.43.1 according to next hop list 10.
!
ip pbr-list 801
name “list #801”
ip-rule 10
next-hop list 10
source-ip host 149.49.42.1
destination-ip host 149.49.43.1
exit
exit
!
! Assign PBR list 801 to interface Vlan 1.
!
interface Vlan 1
icc-vlan
ip pbr-group 801
ip address 149.49.42.254 255.255.255.0
exit
!
interface Vlan 2
ip address 149.49.43.254 255.255.255.0
exit
!
! Configure next hop list 10 with interface fastethernet 10/2 as the
! first next hop, and the VLAN interface used to connet to the external
! router as the second next hop.
!
ip next-hop-list 10
WAN interfaces
Administering Avaya G430 Branch Gateway October 2013 295