Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual de usuario descargar pdf (Pagina 123)

Configuring BGP Accept and Announce Policies

308628-15.0 Rev 00

5-13

Configuring a BGP Announce Policy

BGP announce policies determine which routes in the routing table BGP

advertises to other routers.

To configure a BGP announce policy, you must do the following:

• Supply a name for the new announce policy.

• Specify whether BGP ignores or advertises an update that matches the policy.

• Rank the policy according to precedence.

You can use the BCC or Site Manager to configure BGP announce policies. You

can configure up to 32 BGP announce policies.

Announce Policy Guidelines

When you configure an announce policy with an empty network list and you have

multiple policies configured, make sure that you specify the lowest possible value

for the precedence (BCC) or Rule Precedence (Site Manager) parameter in the

policy that has the empty list. Specifying the lowest precedence value for this

policy ensures that this policy is always the last policy to be used when there are

multiple matching policies.

If your network includes routers from vendors other than Nortel Networks, when

you configure

announce policies, make sure that the network list has at least one

entry. Otherwise, announcements will be made to all routers, which may cause

routing problems for BGP configurations on routers supplied by vendors that do

not implement the extended AS field correctly.

To optimize the use of announce policies, we recommend that you use contiguous

blocks of addresses in network lists and that the network list for each policy

contains the largest contiguous block of addresses possible.

1 2 ... 118 119 120 121 122 123 124 125 126 127 128 ... 275 276

Sin comentarios

Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual de usuario Pagina 123