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4-6
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
eBGP and iBGP Multipath Load Sharing Configuration Example
Example 4-2 configures a router to select six eBGP or iBGP paths as multipaths in address family
configuration mode:
Example 4-2 Configuring eBGP and iBGP Multipath Load Sharing
Router(config)# router bgp 100
Router(config-router)# address-family ipv4 vrf vrf-1
Router(config-router-af)# maximum-paths eibgp 6
Verifying eBGP and iBGP Multipath Load Sharing
Example 4-3 shows sample output displayed when you enter the show ip bgp vpnv4 command. The third
line of output (Multipath:eiBGP) indicates that multipath load sharing is on.
Example 4-3 Verifying eBGP and iBGP Multipath Load Sharing
Router# show ip bgp vpnv4 all 10.22.22.0
BGP routing table entry for 10:1:22.22.22.0/24, version 19
Paths: (5 available, best #5)
Multipath:eiBGP
Advertised to non peer-group peers:
10.0.0.2 10.0.0.3 10.0.0.4 10.0.0.5
22
10.0.0.0 (metric 20) from 10.0.0.4 (10.0.0.4)
Origin IGP, metric 0, localpref 100, valid, internal, multipath
Extended Community:0x0:0:0 RT:100:1 0x0:0:0
Originator:10.0.0.2, Cluster list:10.0.0.4
22
10.0.0.2 (metric 20) from 10.0.0.5 (10.0.0.5)
Origin IGP, metric 0, localpref 100, valid, internal, multipath
Extended Community:0x0:0:0 RT:100:1 0x0:0:0
Originator:10.0.0.2, Cluster list:10.0.0.5
22
10.0.0.2 (metric 20) from 10.0.0.2 (10.0.0.2)
Origin IGP, metric 0, localpref 100, valid, internal, multipath
Extended Community:RT:100:1 0x0:0:0
22
10.0.0.2 (metric 20) from 10.0.0.3 (10.0.0.3)
Origin IGP, metric 0, localpref 100, valid, internal, multipath
Extended Community:0x0:0:0 RT:100:1 0x0:0:0
Originator:10.0.0.2, Cluster list:10.0.0.3
22
10.1.1.12 from 10.1.1.12 (10.22.22.12)
Origin IGP, metric 0, localpref 100, valid, internal, multipath, best
Extended Community:RT:100:1