Configuring IP route preferences

Before you begin

• Disable ECMP before you configure route preferences

Important

Changing route preferences can affect system performance and network accessibility while you perform the procedure. You must therefore change a prefix list or a routing protocol before you activate the protocols.

1. Enter either Global Configuration mode or VRF Router Configuration mode for a specific VRF context:

   enable

   configure terminal

   Optional: router vrf WORD<1-16>

2. Configure the route preference:

   ip route preference protocol <static|ospf-intra|ospf-inter|ebgp|ibgp|rip|ospf-extern1|ospf-extern2|spbm-level1> <0-255>

3. Confirm that the configuration is correct:

   show ip route preference [vrf WORD<1-16>] [vrfids WORD<0-512>]

Example

Configure the route preference to SPBM Level 1 and confirm the configuration is correct.

Switch:1>enable
Switch:1#configure terminal
Switch:1(config)#ip route preference protocol spbm-level1 7
Switch:1(config)#show ip route preference
==============================================================================
                       IP Route Preference - GlobalRouter
==============================================================================
PROTOCOL        DEFAULT    CONFIG
------------------------------------------------------------------------------
LOCAL           0          0
STATIC          5          5
SPBM_L1         7          7
OSPF_INTRA      20         20
OSPF_INTER      25         25
EBGP            45         45
RIP             100        100
OSPF_E1         120        120
OSPF_E2         125        125
IBGP            175        175

View the route preference configuration for a specific VRF, for example 444.

Switch:1>enable
Switch:1#configure terminal
Switch:1(config)#router vrf test
Switch:1(router-vrf)#show ip route preference vrf 444

==============================================================================
                         IP Route Preference - VRF 444

==============================================================================
PROTOCOL        DEFAULT    CONFIG
------------------------------------------------------------------------------
LOCAL           0          0
STATIC          5          5
SPBM_L1         7          7
OSPF_INTRA      20         20
OSPF_INTER      25         25
EBGP            45         45
RIP             100        100
OSPF_E1         120        120
OSPF_E2         125        125
IBGP            175        175