Dell Force10 S4810P Configuration Manual page 210

Use these commands in the following sequence, starting in the CONFIGURATION ROUTER BGP mode
to configure passive peering.
Step Command Syntax
1
neighbor peer-group-name
peer-group passive limit
2
neighbor peer-group-name
subnet subnet-number
mask
3
neighbor peer-group-name
no shutdown
4
neighbor peer-group-name
remote-as as-number
Only after the peer group responds to an OPEN message sent on the subnet does its BGP state change to
ESTABLISHED. Once the peer group is ESTABLISHED, the peer group is the same as any other peer
group.
For more information on peer groups, refer to
Maintain existing AS numbers during an AS migration
The
local-as
existing ASNs during a BGP network migration.
When you complete your migration, be sure to reconfigure your routers with the new information and
disable this feature.
Command Syntax
neighbor {IP address |
peer-group-name local-as as
number [no prepend]
210
| Border Gateway Protocol
Command Mode
CONFIG-ROUTER-BGP
CONFIG-ROUTER-BGP
CONFIG-ROUTER-BGP
CONFIG-ROUTER-BGP
feature smooths out the BGP network migration operation and allows you to maintain
Command Mode
CONFIG-ROUTER-BGP
You must
This feature is not supported on passive peer groups.
Purpose
Configure a peer group that does not initiate TCP
connections with other peers. Enter the limit
keyword to restrict the number of sessions
accepted.
Assign a subnet to the peer group. The peer
group will respond to OPEN messages sent on
this subnet.
Enable the peer group.
Create and specify a remote peer for BGP
neighbor.
Configure Peer Groups on page
Purpose
Allow external routes from this neighbor.
Format:
IP Address: A.B.C.D
Peer Group Name: 16 characters
AS-number: 0-65535 (2-Byte) or 1-4294967295
(4-Byte) or
0.1-65535.65535 (Dotted format)
No Prepend specifies that local AS values are not
prepended to announcements from the neighbor.
Configure Peer Groups before assigning it to an AS.
203.