Dell S4820T, Configuration Manual

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To add an external BGP (EBGP) neighbor, configure the
as-number
parameter with a number
different from the BGP as-number configured in the
router bgp as-number
command.
To add an internal BGP (IBGP) neighbor, configure the
as-number
parameter with the same BGP as-
number configured in the
router bgp as-number
command.
Examples of Viewing and Configuring Peer Groups
After you create a peer group, you can use any of the commands beginning with the keyword
neighbor
to configure that peer group.
When you add a peer to a peer group, it inherits all the peer group’s configured parameters.
A neighbor cannot become part of a peer group if it has any of the following commands configured:
•
neighbor advertisement-interval
•
neighbor distribute-list out
•
neighbor filter-list out
•
neighbor next-hop-self
•
neighbor route-map out
•
neighbor route-reflector-client
•
neighbor send-community
A neighbor may keep its configuration after it was added to a peer group if the neighbor’s configuration is
more specific than the peer group’s and if the neighbor’s configuration does not affect outgoing updates.
NOTE: When you configure a new set of BGP policies for a peer group, always reset the peer group
by entering the
clear ip bgp peer-group peer-group-name
command in EXEC Privilege
mode.
To view the configuration, use the
show config
command in CONFIGURATION ROUTER BGP mode.
When you create a peer group, it is disabled (shutdown). The following example shows the creation of a
peer group (zanzibar) (in bold).
Dell(conf-router_bgp)# neighbor zanzibar peer-group
Dell(conf-router_bgp)#show conf
!
router bgp 45
bgp fast-external-fallover
bgp log-neighbor-changes
neighbor zanzibar peer-group
neighbor zanzibar shutdown
neighbor 10.1.1.1 remote-as 65535
neighbor 10.1.1.1 shutdown
neighbor 10.14.8.60 remote-as 18505
neighbor 10.14.8.60 no shutdown
Dell(conf-router_bgp)#
To enable a peer group, use the
neighbor peer-group-name no shutdown
command in
CONFIGURATION ROUTER BGP mode (shown in bold).
Dell(conf-router_bgp)# neighbor zanzibar no shutdown
Dell(conf-router_bgp)#show config
!
router bgp 45
bgp fast-external-fallover
bgp log-neighbor-changes
Border Gateway Protocol IPv4 (BGPv4)
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