Brocade Multi-Service IronWare Routing Configuration Guide Bedienungsanleitung PDF herunterladen (Seite 303)

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Configuring IS-IS point-to-point over Ethernet

IS-IS uses its neighbor’s MAC address to form an adjacency and stores the neighbors MAC address

to recognize the adjacency in the future. This is no problem with directly adjacent routers but can

become a problem when adjacency is required between routers that are more than one hop away.

To accommodate an IS-IS network with this type of configuration, the IS-IS Point-to-Point over

Ethernet feature has been developed.

Using the IS-IS Point-to-Point feature over ethernet, routers that are several hops away or available

through an IP GRE tunnel (as described in “Configuring IS-IS over a GRE IP tunnel” on page 277)

can form an IS-IS adjacency. It can be used when only two IS’s are part of the broadcast network.

This feature is configured at the interface level of the routers that are forming an adjacency. For

example, Figure 20 shows two Brocade devices several hops away from each other that are

configured for IS-IS adjacency.

FIGURE 20 IS-IS Point-to-Point configuration

You can use the commands in the following configurations to enable the IS-IS Point-to-Point

feature:

Brocade IS-IS Router A configuration

To configure Brocade IS-IS Router A for the IS-IS Point-to-Point feature use the following commands.

Brocade(config)# interface ethernet 1/1

Brocade(config-if-e10000-1/1)# ip router isis

Brocade(config-if-e10000-1/1)# ip address 10.10.2.2

Brocade(config-if-e10000-1/1)# isis point-to-point

Brocade IS-IS Router B configuration

To configure Brocade IS-IS Router B for the IS-IS Point-to-Point feature use the following commands.

Brocade(config)# interface ethernet 2/1

Brocade(config-if-e10000-2/1)# ip router isis

Brocade(config-if-e10000-2/1)# ip address 10.10.1.2

Brocade(config-if-e10000-2/1)# isis point-to-point

Syntax: [no] isis point-to-point

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