User guide

Configuring BGP for IPv6 Configuring BGP
page 4-72 OmniSwitch AOS Release 7 Advanced Routing Configuration Guide March 2015
-> ipv6 bgp network 2001::/64 local-preference 600
The local preference for routes generated by the network is now changed from the default value to 600.
Community
Communities are a way of grouping BGP destination addresses that share some common property. Adding
the local network to a specific community indicates that the network shares a common set of properties
with the rest of the community.
To change from the default community and add a network to a community, enter the local network IPv6
address and mask in conjunction with the ipv6 bgp network community command and name, as shown:
-> ipv6 bgp network 2001::/64 community 100:200
Network 2001::/64 is now changed from the default community to the 100:200 community.
To remove the local network from the community, enter the local network as above with the community
set to “none”, as shown:
-> ipv6 bgp network 2001::/64 community none
The network is now no longer in any community.
Metric
A metric for an IPv6 network is the Multi-Exit Discriminator (MED) value. This value is sent from routers
of one AS to another to indicate the path that the remote AS can use to send data to the local AS assuming
there is more than one. A lower value indicates a more preferred exit point. For example, a route with a
MED of 10 is more likely to be used than a route with an MED of 100.
To change from the default network metric value and set a new network metric value, enter the network
IPv6 address and mask in conjunction with the ipv6 bgp network metric command and value, as shown:
-> ipv6 bgp network 2001::/64 metric 100
The IPv6 network 2001::/64 is now changed from the default metric to the new metric of 100.
Viewing Network Settings
To view the network settings for all IPv6 networks assigned to the speaker, enter the show ipv6 bgp
network command, as shown:
-> show ipv6 bgp network
A display similar to the following appears:
Network Admin state Oper state
----------------------+-----------+------------
2525:500:600::/64 enabled active
To display a specific IPv6 network, enter the same command with the network IPv6 address and mask, as
shown:
-> show ipv6 bgp network 2525:500:600::/64.
A display similar to the following appears: