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host1:vr1(config-router-af)#exit-address-family

■ There is no no version.

■ See exit-address-family.

neighbor activate

■ Use to specify a peer or peer group with which routes of the current address

family are exchanged.

■ A peer or peer group can be activated in more than one address family. By

default, a peer is activated only for the IPv4 unicast address family.

■ The peer or peer group must be created in unicast IPv4 before you can activate

it in another address family.

■ If you specify a BGP peer group by using the peerGroupName argument, all the

members of the peer group inherit the characteristic configured with this

command unless it is overridden for a specific peer.

■ The address families that are actively exchanged over a BGP session are

negotiated when the session is established.

■ This command takes effect immediately. If dynamic capability negotiation was

not negotiated with the peer, the session is automatically bounced so that the

exchanged address families can be renegotiated in the open messages when the

session comes back up.

If dynamic capability negotiation was negotiated with the peer, BGP sends a

capability message to the peer to advertise or withdraw the multiprotocol

capability for the address family in which this command is issued. If a neighbor

is activated, BGP also sends the full contents of the BGP routing table of the newly

activated address family.

■ Example

host1:vr1(config-router-af)#neighbor 192.168.1.158 activate

■ Use the no version to indicate that routes of the current address family are not

to be exchanged with the peer. Use the default version to remove the explicit

configuration from the peer or peer group and reestablish inheritance of the

feature configuration.

■ See neighbor activate.

If you have configured some or all neighbors to be in the multicast or VPN-IPv4

address families, you can quickly configure all neighbors to be part of the IPv4 unicast

address family by issuing the bgp default ipv4-unicast command.

Enabling Lenient Behavior

You can use the neighbor lenient command to enable the BGP speaker to attempt

to recover from malformed packet errors and finite state machine errors generated

by a peer. If BGP can recover from the error, it logs a warning message and attempts

to maintain the session with the peer. The normal, nonlenient behavior is for the

46 ■ Configuring BGP Peer Groups

JUNOSe 11.1.x BGP and MPLS Configuration Guide

Juniper BGP - CONFIGURATION GUIDE V 11.1.X User Manual

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