IBM SC30-3681-08 manual DTE Address Wildcards, Local DTEs, Peer Routers, Remote DTEs

Using XTP

vRemote DTEs

vPVCs

vCUGs

Local DTEs

X.25 nodes connected to the X.25 interfaces on the router

To con®gure local DTEs, use the X.121 address that is assigned to the local

DTE. Multiple local DTEs can be con®gured on an interface.

Peer Routers

Routers with which you communicate over TCP/IP

Peer routers can differ depending on ªpoint of viewº. For example, in Figure 19 on page 362, the two remote routers are the peer routers from the perspective of the concentrator router. However, the concentrator router is the peer router from the perspective of the two remote routers.

You designate the peer router by its internal IP address.

Remote DTEs

Remote X.25 nodes to which the local X.25 nodes open connections and exchange data. Use the X.121 address that is assigned to the remote DTE.

Con®gure aunique IP address for each peer router. For example, in

Figure 19 on page 362, the concentrator router must know the unique IP

address of each remote router, and each remote router must know the IP

address of the concentrator router.

PVC A permanent channel that remains connected after X.25 restarts.

PVCs, because they are constant channels, are similar to leased telephone

lines. A PVC, in the XTP context, is a PVC from a local X.25 DTE node to a

remote X.25 DTE.

When you con®gure a router for PVCs, map the IP address of the peer

router and the PVC number of the remote and local DTE. A PVC is

identi®ed by four pieces of information which are the:

v Logical channel numbers of the local PVCs

v X.121 address of the local DTE

v Logical channel numbers of the PVCs on the remote (peer) router

v X.121 address of the remote DTE

CUGS The closed user groups for the XTP protocol. See ªUnderstanding Closed

User Groupsº on page 324.

Additional con®guration information can be found at ªCon®guring XTPº on page 366 and at ªXTP Con®guring Commandsº on page 375.

DTE Address Wildcards

The ª*º wildcard is available for DTE address con®guration. This is in addition to the ª?º character that can be speci®ed in a DTE address to represent any one digit in that position in the address. For example, a speci®cation of ª1?2?3º can match address 18243 where the ®rst, third, and ®fth digits are 1, 2, and 3, respectively.

The ª*º wildcard character can represent any string of zero or more digits. Its use is limited to the end of a DTE address speci®cation. For example: ª123*º, ª5555*º, ª9*º

Chapter 28. Using XTP 363