Bgp Stub Limitations; Configuring Bgp Stub Routing - Cisco 7604 Configuration Manual

Chapter 8 Configuring IP Routing and DHCP Services
BGP stub routing is a licensed feature. You must have or obtain a license key that supports BGP stub
routing to configure this feature.
This section includes the following topics:
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BGP Stub Limitations

The following limitations apply to configuring BGP stub routing on the FWSM:
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Configuring BGP Stub Routing

Before configuring BGP stub routing on the FWSM:
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Note Although in multiple context mode the BGP routing process is configured in the admin context, only the
static routes and directly-connected networks for the context that the BGP peer is reachable through can
be advertised.
To enable and configure a BGP routing process, perform the following steps:
Create the BGP routing process by entering the following command:
Step 1
hostname(config)# router bgp as-number
Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM
OL-20748-01
BGP Stub Limitations, page 8-7
Configuring BGP Stub Routing, page 8-7
Monitoring BGP Stub Routing, page 8-8
Restarting the BGP Stub Routing Process, page 8-9
You can only configure one BGP routing process, even in multiple context mode.
You can only configure one BGP neighbor, even in multiple context mode.
The FWSM does not process UPDATE messages received from the BGP neighbor. It can only send
routing updates to the BGP neighbor.
The FWSM only advertises static routes and directly-connected networks. You cannot redistribute
routes from other routing protocols into the BGP routing process.
In multiple context mode, the FWSM can only advertise static routes and directly-connected
networks for the context that contains the interface the BGP peer is reachable through and for which
there are configured network commands. If the BGP neighbor is reachable through an interface that
is shared across multiple contexts, then all of the static routes and directly-connected networks in
the contexts sharing the interface are available to the BGP routing process.
BGP stub does not support IPv6, VPN, or NLRI multicast.
Only iBGP is supported; eBGP is not supported.
You must enable route reflector on the BGP neighbor.
If the FWSM is in multiple context mode, you must be in the admin context to configure BGP stub
routing. Additionally, the admin context must be in routed mode.
Configuring BGP Stub Routing
8-7