bgp default route-target filter

To enable automatic Border Gateway Protocol (BGP) route-target community filtering, use the bgp default route-target filter command in router configuration mode. To disable automatic BGP route-target community filtering, use the no form of this command.

bgp default route-target filter
no bgp default route-target filter


Defaults
This command is enabled by default.

Usage Guidelines
Use the bgp default route-target filter command to control the distribution of Virtual Private Network (VPN) routing information through the list of VPN route-target communities.
When you use the no form of this command, all received VPN-IPv4 routes are accepted by the configured router. Accepting VPN-IPv4 routes is the desired behavior for a router configured as an autonomous system border edge router or as a customer edge (CE) BGP border edge router.
If you configure the router for BGP route-target community filtering, all received exterior BGP (EBGP) VPN-IPv4 routes are discarded when those routes do not contain a route-target community value that matches the import list of any configured VPN routing/forwarding instances (VRFs). This is the desired behavior for a router configured as a provider edge (PE) router.

Examples
In the following example, BGP route-target filtering is disabled for autonomous system 120:

Router(config)# router bgp 120
Router(config-router)# no bgp default route-target filter
Post a Comment

Popular posts from this blog

Pairwise Master Key (PMK) vs Parewise Transient Key(PTK) vs PseudoRandom Function(PRF) vs GTK (Groupwise Transient Key)

DSSS(直接序列展頻技術) vs OFDM(正交頻率多重分割)

DTMF Relay : RTP-NTE vs SIP INFO vs SIP NOTIFY