Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual de usuario descargar pdf (Pagina 165)

Customizing EGP Services

308628-15.0 Rev 00

8-5

EGP Implementation Notes

This section provides you with some important guidelines to follow when you

configure EGP. If you do not follow these guidelines, EGP will become disabled

on the interfaces involved.

• Autonomous system numbers must be from 1 through 65,535.

• Two autonomous systems connected by an EGP link must have different

autonomous system numbers.

• The remote IP address cannot be the same as any local IP interface address.

• The remote IP address must be on the same subnet as one of the local IP

interfaces.

• EGP does not have any loop avoidance techniques—avoid loop topologies;

otherwise, you will have to configure EGP route filters to counter the

redundancies.

• An EGP configuration between two ASs, each using a subnetted interface to a

class A network, results in a routing black hole. RIP Version 1 aggregates the

single subnet into the natural network, but the gateway router does not have

complete subnet information or a natural network route to match the one

being advertised by RIP Version 1. This black hole is not an EGP or RIP

defect: rather, it is caused by the way RIP aggregates subnets into natural

networks.

EGP will operate over a subnetted interface between two Nortel Networks

routers if a static route is implemented. The router accepting the subnet from

the remote network must augment the single subnet information with a static

route for the entire remote network.

1 2 ... 160 161 162 163 164 165 166 167 168 169 170 ... 275 276

Sin comentarios

Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manual de usuario Pagina 165