Cisco Cisco MGX 8880 Media Gateway Release Notes

This section contains the descriptions of the features that were introduced in releases prior to 12.3(2)T2.

In Cisco MGX Release 3.0.10 and later, the Cisco MGX 8950 switch supports the MGX RPM-XF card 
set. The MGX RPM-XF card set can occupy any of the available service module slots in the 
Cisco MGX 8950 switch, which are slots 1 through 6 and slots 11 through 16.

To load-balance by external Border Gateway Protocol (eBGP) and internal Border Gateway Protocol 
(iBGP) on multiple paths to a destination, traffic is directed on multiple available paths between 
autonomous systems (AS) by gateway routers.

The following CLI commands are used to implement this feature.

The limitations of eiBGP are as follows:

If multiple alternate paths for a peering point exist, only one of the paths is used for a given prefix.

Only per-flow load-balancing is supported. Per-packet load-balancing is not supported.

eiBGP load-balancing is supported only in MPLS and VPN networks.

maximum-path <nums>

Configure maximum number of eiBGP parallel routes.

For example:

bgpbox-zenith-CE1(config)#router bgp 4

bgpbox-zenith-CE1(config-rout)#maximum-paths 3

bgpbox-zenith-CE1(config-rout)#end

This command is enhanced to show the multipaths.

Each multipath is marked as multipath.

The bestpath is marked as multipath and bestpath.

The output describes the type of multipath that is enabled.

For example:

bgpbox-zenith-CE1#sh ip bgp 141.22.0.0

BGP routing table entry for 141.22.0.0/16, version 18

Paths: (2 available, best #1)

Multipath: eBGP

Advertised to non peer-group peers:

7.0.76.9

100 5

7.0.76.2 from 7.0.76.2 (100.0.0.2)

Origin IGP, localpref 100, valid, external, multipath, 

best

100 5

7.0.76.9 from 7.0.76.9 (100.0.0.9)

Origin IGP, localpref 100, valid, external, multipath