Avaya Configuring IP, ARP, RIP, and OSPF Services Manual de usuario descargar pdf (Pagina 60)

Configuring IP, ARP, RARP, RIP, and OSPF Services

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308627-14.00 Rev 00

As it does with routes learned over numbered interfaces, IP stores each route

learned over an unnumbered interface in the routing table. The routing-table entry

for a route learned over an unnumbered interface contains the following values:

Point-to-point connections using unnumbered interfaces can be configured to

advertise RIP, OSPF, IBGP, DVMRP, and static routes.

The associated address assigned to the unnumbered interface determines whether

or not RIP configured to send updates in Version 1 mode will advertise a

subnetwork over the unnumbered interface. The associated address also

determines which mask is applied to RIP V1 updates received on that interface.

For unnumbered links using RIP V1, the defined associated addresses at each end

of the link must belong to the same network and have the same mask for routes to

be exchanged correctly.

If a subnetwork on the router has the same mask as the associated address, RIP V1

will advertise that subnet over the unnumbered interface. If the mask on the

subnetwork is different from the mask of the associated address, RIP V1

advertises only the natural network of the subnet.

BGP peers, NetBIOS, and BootP cannot be configured directly on an unnumbered

interface. To configure a BGP peer-to-peer session on routers connected through

unnumbered interfaces, see Configuring IP Exterior Gateway Protocols (BGP and

EGP). To route NetBIOS packets over an unnumbered interface, you must

configure a static entry to the name server. To run BootP over unnumbered

interfaces, you must select a preferred BootP server. For instructions, see

Configuring SNMP, BootP, and DHCP Services.

Next-hop address 0

Next-hop mask 0

Next-hop interface Circuit number of the unnumbered interface

Note: Unnumbered interfaces cannot be pinged directly. For this reason, such

interfaces can make it difficult to diagnose router problems.

Note: Nortel Networks recommends that you select RIP2 mode for

unnumbered interfaces. With RIP2, RIP updates contain both the route and

mask information.

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Avaya Configuring IP, ARP, RIP, and OSPF Services Manual de usuario Pagina 60