Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual de usuario descargar pdf (Pagina 262)

Configuring IP Exterior Gateway Protocols (BGP and EGP)

B-6

308628-15.0 Rev 00

Interpreting the Configuration Command Equivalents Table

The numbers in the following list correspond to the item numbers in Table B-1.

Each item describes the function of the commands in the corresponding row.

Enable the Border Gateway Protocol (BGP) routing process and identify the

local router autonomous system (AS), 333. Activate a BGP session with peer

router IP address 1.1.1.2 that belongs to AS 444. If the local and remote AS

numbers are the same, the BGP session is internal, otherwise it is an external

session. Note that Nortel Networks also requires definition of the local router

IP address, 1.1.1.1.

Advertise network 1.1.1.0 mask 255.255.255.0 and originate it from the local

AS. Note that network 1.1.1.0 must be present in the IP routing table for

Cisco’s BGP network command to advertise the route.

Accept incoming advertisement of network 128.1.0.0 mask 255.255.0.0 from

peer IP address 1.1.1.1, as specified by Cisco access list 5 or the Nortel

Networks policy IncomingRoutes.

Announce advertisement of network 195.89.32.0 mask 255.255.224.0 to peer

IP address 1.1.1.1, as specified by Cisco access list 10 or the Nortel Networks

policy OutgoingRoutes.

Accept incoming advertisements from peer 1.1.1.1, match on AS-Path that

contains either AS “333 444” or “345” and set Local Preference to 125, as

specified by Cisco route-map and the Nortel Networks policy IncomingMap.

Announce advertisements to peer 1.1.1.1 and append AS-Path “123 123” to

all outgoing updates, as specified by Cisco route-map and the Nortel

Networks policy setASPath. Note that in the Nortel Networks command, if

you use “as-path” instead of “as-path-prepend,” the AS path is replaced

instead of appended to.

Announce advertisement of network 192.10.20.0 mask 255.255.255.0 to peer

IP address 1.1.1.1, setting multiexit discriminator (MED) to 100 as specified

by Cisco route-map and the Nortel Networks policy AdvertiseMap. In

addition, advertise any other networks with MED set to 50. The Nortel

Networks definition requires two separate announce policies with the more

specific network advertised given the higher rule precedence.

Accept incoming advertisements from peer 1.1.1.1 of AS-Path that contains

either exactly AS 1000 or 5000 as specified by Cisco as-path access-list 5 and

the Nortel Networks policy IncomingRoutes.

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Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual de usuario Pagina 262