The software applies these parameters to each neighbor you add to the peer group. You can override the description parameter for
individual neighbors. If you set the description parameter for an individual neighbor, the description overrides the description configured
for the peer group.
Syntax:
neighbor
peer-group-name
peer-group
The
peer-group-name
parameter specifies the name of the group and can be up to 80 characters long. The name can contain special
characters and internal blanks. If you use internal blanks, you must use quotation marks around the name. For example, the command
neighbor "My Three Peers"
peer-group is valid, but the command
neighbor My Three Peers
peer-group is not valid.
Syntax:
[no] neighbor
ip-addr
|
peer-group-name
[
advertisement-interval
num
] [
default-originate
[
route-map
map-name
]]
[
description
string
] [
distribute-list
{
in
|
out
}
num,num...
|
ACL-num
in
|
out
] [
ebgp-multihop
[
num
]] [
filter-list in
|
out
num,num,...
|
acl-num
|
out
|
weight
] [
maxas-limit in
[
num
|
disable
] [
maximum-prefix
num
[
threshold
] [
teardown
]] [
next-hop-self
] [
password
string
] [
prefix-list
string
in
|
out
]
remote-as
as-number
] [
remove-private-as
] [
route-map-in
|
out
map-name
] [
route-reflector-
client
] [
send-community
] [
soft-reconfiguration inbound
] [
shutdown
] [
timers keep-alive
num
hold-time
num
] [
update-source
loopback
num
ethernet
unit
/
slot
/
port
|
loopback
num
|
ve
num
] [
weight
num
] [
local-as
as-num
]
The
ip-addr
and
peer-group-name
parameters indicate whether you are configuring a peer group or an individual neighbor. You can
specify a peer group name or IP address with the
neighbor
command. If you specify a peer group name, you are configuring a peer
group. If you specify a neighbor IP address, you are configuring that individual neighbor. Use the
ip-addr
parameter if you are configuring
an individual neighbor instead of a peer group.
The remaining parameters are the same ones supported for individual neighbors.
Applying a peer group to a neighbor
After you configure a peer group, you can add neighbors to the group. When you add a neighbor to a peer group, you are applying all the
neighbor attributes specified in the peer group to the neighbor.
To add neighbors to a peer group, enter commands such as the following.
device(config-bgp-router)# neighbor 192.168.1.12 peer-group PeerGroup1
device(config-bgp-router)# neighbor 192.168.2.45 peer-group PeerGroup1
device(config-bgp-router)# neighbor 192.168.3.69 peer-group PeerGroup1
The commands in this example add three neighbors to the peer group "PeerGroup1". As members of the peer group, the neighbors
automatically receive the neighbor parameter values configured for the peer group. You also can override the parameters on an individual
neighbor basis. For neighbor parameters not specified for the peer group, the neighbors use the default values.
Syntax:
[no] neighbor
ip-addr
peer-group
peer-group-name
The
ip-addr
parameter specifies the IP address of the neighbor.
The
peer-group-name
parameter specifies the peer group name.
NOTE
You must add the peer group before you can add neighbors to it.
Administratively shutting down a session with a BGP4 neighbor
You can prevent the device from starting a BGP4 session with a neighbor by administratively shutting down the neighbor. This option is
very useful for situations in which you want to configure parameters for a neighbor, but are not ready to use the neighbor. You can shut
the neighbor down as soon as you have added it to the device, configure the neighbor parameters, then allow the device to reestablish a
session with the neighbor by removing the shutdown option from the neighbor.
When you apply the option to shut down a neighbor, the option takes place immediately and remains in effect until you remove it. If you
save the configuration to the startup configuration file, the shutdown option remains in effect even after a software reload.
Basic configuration tasks required for BGP4
FastIron Ethernet Switch Layer 3 Routing
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