Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Bedienungsanleitung PDF herunterladen (Seite 104)

Configuring IP Exterior Gateway Protocols (BGP and EGP)

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308628-15.0 Rev 00

To establish a peer-to-peer session between router A and router B:

Select a numbered interface on each router for the peer-to-peer session.

Note the network and subnet that each interface is on.

In Figure 4-2

, router A has a numbered interface to network 1. Router B has a

numbered interface to network 3. The network administrator selects these two

interfaces to support the peer-to-peer session.

If the two routers are in different ASs, enable multihop EBGP

connections.

(See “

Enabling Multihop Connections” on page 3-13.)

If no interior gateway protocol (RIP or OSPF) is running over the

unnumbered link, configure a static route on each router to the other

router’s network and subnet.

Because the routers do not share a numbered subnet, each BGP peer needs to

know a route to the network and subnet of the interface that the other BGP

peer uses. If an IGP (RIP or OSPF) is running over the unnumbered link, RIP

or OSPF learns the route and stores it in the routing table. Otherwise, you

need to configure a static route on each router to the other BGP peer’s

network/subnet. The route should point to the unnumbered link.

Configure the BGP connection on each router.

Configuring and Enabling MD5 Authentication

BGP-4 TCP MD5 authentication lets you configure BGP peers to ensure secure

message interchange. BGP-4 TCP MD5 message authentication provides the

following features:

• A TCP MD5 signature can exist for BGP peers.

•

You can configure authentication and secret keys on a per-peer basis.

Peers

configured with common secret keys can authenticate each other and

exchange routing information.

• Configurations can concurrently have BGP peers with authentication enabled

and authentication disabled.

•

You can store keys as either clear text or encrypted, and you can set this

storage mode on a per-peer basis.

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Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Bedienungsanleitung Seite 104