
Configuring and Customizing BGP
117356-D Rev 00
8-21
Using Site Manager
Enabling Multihop Connections
By default, BGP enforces the one-hop rule for BGP peers -- the remote peer must
be located on a directly attached network.
You can use the BCC or Site Manager to override the restriction and allow
multihop connections.
You can configure each peer in the multihop session with a TTL value that IP uses
as the hop count limit for forwarding packets during the session. (See “Setting the
TTL Counter on an Update” on page 8-57.)
Site Manager Procedure
You do this System responds
1. In the Configuration Manager window,
choose
Protocols
.
The Protocols menu opens.
2. Choose
IP
. The IP menu opens.
3. Choose
BGP
. The BGP menu opens.
4. Choose
BGP Global
. The Edit BGP Global Parameters window
opens.
5. Set the
BGP Collision Detect
parameter.
Click on
Help
or see the parameter
description on page A-6.
6. Click on
OK
. Site Manager returns you to the
Configuration Manager window.
Caution:
Enabling multihop BGP connections is dangerous because it can
cause BGP speakers to establish a BGP connection that traverses a third-party
AS, which may violate policy considerations and may also introduce
forwarding loops.
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