Specifications

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Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
Chapter 2 Configuring General Switch Features
Configuring PNNI Node Parameters
The switch displays a report similar to the following example:
8850_LA.7.PXM.a > dsppnni-node
node index: 1 node name: 8850_LA
Level............... 56 Lowest.............. true
Restricted transit.. off Complex node........ off
Branching restricted on
Admin status........ up Operational status.. up
Non-transit for PGL election.. off
Node id...............56:160:47.00918100000100001a531c2a.00001a531c2a.01
ATM address...........47.00918100000100001a531c2a.00001a531c2a.01
Peer group id.........56:47.00.9181.0000.0100.0000.0000.00
Setting and Viewing the SPVC Prefix
The Cisco MGX and SES PNNI Network Planning Guide provides guidelines for selecting the SPVC
prefix. The SPVC prefix is the ATM prefix that PNNI advertises for all SPVCs and soft permanent virtual
paths (SPVP) on this node. The ATM address for each SPVC and SPVP is the combination of the SPVC
prefix and a port identification number.
You can configure one SPVC node prefix per node. To set the SPVC prefix, use the following procedure.
Note Although the SPVC prefix is set to match the first 13 bytes of the PNNI node address by default,
changing either the PNNI node address or the SPVC prefix has no effect on the other setting. If the PNNI
node ATM address and the SPVC prefix do not match, the switch advertises both prefixes instead of just
one, and this advertising takes additional bandwidth.
Note You can change the SPVC prefix only when no SPVCs or SPVPs have been defined. Once an SPVC has
been defined, you must delete all SPVCs before you can change the SPVC prefix. For information on
deleting SPVCs, see the “Deleting SPVCs and SPVPs” section in Chapter 6, “Provisioning AXSM
Communication Links.”
Step 1 Establish a configuration session using a user name with SUPER_GP privileges or higher.
Step 2 Enter the following command to display the current SPVC prefix:
8850_LA.7.PXM.a > dspspvcprfx
The switch response is similar to the following:
8850_LA.7.PXM.a > dspspvcprfx
SPVC Node Prefix: 47.00918100000000001a531c2a
Tip If the SPVC prefix begins with 47.009181000000, the SPVC prefix is probably set to the default
value. To display the current PNNI node address, enter the dsppnni-node command.