Avaya Configuring DLSw Services Manual do Utilizador descarregar pdf (Página 72)

Configuring DLSw Services

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Local Bay Networks routers receive frames that contain information about the

location (that is, the DLSw peer IP address) of each remote system that uses

DLSw services. This information is learned from broadcast frames (TESTs, XIDs

and NetBIOS) generated by the remote endstations or applications. The router

stores this information in separate NetBIOS and MAC caches.

The router uses the learned IP address to locally specify the DLSw peer that can

reach the desired endstation. The cache is not used for forwarding trafﬁc during

the ﬁrst LLC2 session, but will be used in new sessions with that endstation.

You can set a timer value that determines when NetBIOS or MAC cache entries in

the router disappear. The timer parameters are NetBIOS Cache Age and MAC

Cache Age. When the cached entry goes unused for the speciﬁed cache age time,

or becomes unreachable to new queries, it is removed from the cache and

subsequent frames are broadcast to all conﬁgured peers.

The router refreshes a cache entry when DLSw services establish a connection to

the NetBIOS or SNA system associated with that entry. (The router resets the

appropriate Cache Age timer to its maximum wait interval.)

Statically Deﬁned Remote Systems

To reduce DLSw broadcasts, you can deﬁne the IP addresses of DLSw peers that

can reach remote systems or applications associated with speciﬁc NetBIOS names

or MAC addresses. This information augments any information that the router’s

MAC and NetBIOS caching mechanisms learn dynamically.

Static entries can exist in two tables:

• Default MAC Peer IP Table

Each entry in this table contains a MAC address and the IP address of a DLSw

peer which can forward packets to this MAC address.

• Default NetBIOS Peer IP Table

Each entry in this table contains the NetBIOS name and the IP address of the

DLSw peer to which this NetBIOS device is connected.

In the local router’s Default NetBIOS Peer IP Table, enter the IP address of the

remote peer associated with any remote NetBIOS application you need to reach

through DLSw services. Each entry in this table associates the name of a NetBIOS

client with the IP address of the DLSw peer that can reach that client.

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Avaya Configuring DLSw Services Manual do Utilizador Página 72