3com MSR 20-20 참조 매뉴얼

rr-filter extended-community-list-number

BGP-VPNv4 subaddress family view/BGP-L2VPN address family view

extended-community-list-number: Number of the extended community list 
supported by the RR group, in the range 1 to 199.

Use the rr-filter command to create an RR reflection policy.

Use the undo rr-filter command to disable the function.

Only IBGP routes whose route target extended community attributes satisfy the 
matching conditions are reflected. This provides a way to implement load 
balancing between RRs.

# In BGP-VPNv4 subaddress family view, create an RR group and configure it to 
automatically filter the incoming VPNv4 route update packets based on the route 
target extended community attribute.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] ipv4-family vpnv4

[Sysname-bgp-af-vpnv4] rr-filter 10 

# In BGP-L2VPN address family view, create an RR group and configure it to 
automatically filter the incoming VPNv4 route update packets based on the route 
target extended community attribute.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] l2vpn-family

[Sysname-bgp-af-l2vpn] rr-filter 10 

sham-link source-ip-address destination-ip-address [ cost cost | dead dead-interval | 
hello hello-interval | retransmit retrans-interval | trans-delay delay | simple [ cipher | 
plain ] password1 | { md5 | hmac-md5 } key-id [ cipher | plain ] password2 ] *

undo sham-link source-ip-address destination-ip-address [ cost | dead | hello | 
retransmit | trans-delay | simple | { md5 | hmac-md5 } key-id ] *

OSPF area view

source-ip-address: Source IP address for the sham link.

destination-ip-address: Destination IP address for the sham link.