Configuration Prerequisites; Configuring Bgp Peer Group - H3C S5600 Series Operation Manual

Community can also be used to ease the routing policy management. And its management range is
much wider than that of the peer group. It is AS-independent. It controls the routing policy of multiple
BGP routers.
In an AS, to ensure the connectivity among IBGP peers, you need to set up full connection among them.
When there are too many IBGP peers, it will cost a lot in establishing a full connection network. Using
RR or confederation can solve the problem. In a large AS, RR and confederation can be used
simultaneously.

Configuration Prerequisites

Before configuring a large-scale BGP network, ensure network layer connectivity between adjacent
nodes.
Before configuring a large-scale BGP network, you need to prepare the following data:
Peer group type, name, and the peers included.
If you want to use community, the name of the applied routing policy is needed.
If you want to use RR, you need to determine the roles (client, non-client) of routers.
If you want to use confederation, you need to determine the confederation ID and the sub-AS
number.

Configuring BGP Peer Group

Follow these steps to configure a BGP peer group:
Enter system view
Enter BGP view
Create an IBGP peer
group
Create an
IBGP peer
Add a peer to a peer
group
group
Create an EBGP peer
group
Create an
Configure the AS number
EBGP peer
of a peer group
group
Add a peer to a peer
group
Create an EBGP peer
Create a
group
hybrid
EBGP peer
Add a peer to a peer
group
group
Finish the session with the specified
peer/peer group
To do... Use the command...
system-view
bgp as-number
group group-name
[ internal ]
peer ip-address group
group-name [ as-number
as-number ]
group group-name external
peer group-name
as-number as-number
peer ip-address group
group-name [ as-number
as-number ]
group group-name external
peer ip-address group
group-name [ as-number
as-number ]
peer { group-name |
ip-address } shutdown
5-25
Remarks
—
—
Optional
If the command is executed without
the internal or external keyword, an
IBGP peer group will be created. You
can add multiple peers to the group,
and the system will automatically
create a peer in BGP view, and
configure its AS number as the local
AS number.
Optional
You can add multiple peers to the
group. The system automatically
creates the peer in BGP view and
specifies its AS number as the one of
the peer group.
Optional
You can add multiple peers to the
peer group.
Optional