Cisco 10000 - Manual (Page 137)

4-5
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 4 Configuring Multiprotocol Label Switching
BGP Multipath Load Sharing for eBGP and iBGP in an MPLS VPN
Configuring Multipath Load Sharing for eBGP and iBGP
To configure iBGP and eBGP routes for multipath load sharing, enter the following commands beginning
in global configuration mode:
Example 4-1 shows how to configure a VRF named main for an IPv4 session and configures a router to
select 4 eBGP or iBGP paths as multipaths in address family configuration mode.
Example 4-1 Configuring eBGP and iBGP Multipath Load Sharing
Router(config)# router bgp 50
Router(config-router)3 address-family ipv4 vrf main
Router(config-router-af)# maximum-paths eibgp 4
Verifying Multipath Load Sharing for eBGP and iBGP
To verify that iBGP and eBGP routes are configured for load sharing, enter any of the following
commands in privileged EXEC mode:
Configuration Examples for BGP Multipath Load Sharing for eBGP and iBGP
in an MPLS VPN
This section provides the following configuration examples:
• eBGP and iBGP Multipath Load Sharing Configuration Example, page 4-6
• Verifying eBGP and iBGP Multipath Load Sharing, page 4-6
Command Purpose
Step 1 Router(config)# router bgp as-number Configures the router to run a BGP process and enters router
configuration mode.
Step 2 Router(config-router)# address-family
ipv4 vrf vrf-name
Configures a VRF instance for an IPv4 session and enters address
family configuration mode.
Step 3 Router(config-router-af)# maximum-paths
eibgp number-of-paths
Configures the number of parallel iBGP and eBGP routes that can
be installed into a routing table. The maximum number of
configurable paths on the PRE2 is 6.
Note You must configure the maximum-paths eibgp command
in address family IPv4 VRF configuration mode. You
cannot configure the command in any other address
family configuration mode.
Command Purpose
Router# show ip bgp vpnv4 all Displays all available VPNv4 information from the BGP
database.
Router# show ip route vrf vrf-name Displays the IP routing table associated with a virtual routing and
forwarding (VRF) instance.