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Cisco MGX 8850 Routing Switch Command Reference
Release 2.0, Part Number 78-10467-04 Rev C0, October 2001
Chapter6 Logical Node, Port, and Signaling Com m ands cnfspvcprfx
cnfspvcprfx
Configure SPVC Prefix—configure a node-level prefix for SPVCs.
For the node to support SPVCs, it must have a 13-byte SPVC prefix that applies to the entire node. No
SPVCs can exist on the node until it has an SPV C prefix. Likewise, to change this prefix, no SPVCs can
exist on the node.

Prerequisites

Setting up a node and a network requires advance planning for the PNNI node addressing scheme. For
basic guidance on the topic of address planning, refer to related material in the Cisco MGX 8850 Switch
Software Configuration Guid e, Release 2.
Cisco provides a default SPVC prefi x t ha t i s th e s a m e a s th e C isc o-supplied ATM address prefix. Each
of these default prefixes contains an International Code Designator (ICD) that is unique to Cisco
Systems. Therefore, Cisco System s r ec om mends that you change the ICD i de nt ifier for b ot h th e ATM
address prefix and the SPVC prefix if the node is planned for ope ration in a public ATM n etwork. If the
node operates in a private ATM network, it can keep the default ATM and SPVC address prefixes.
The following list shows the order of p r er eq ui sit e c ommands and the cnfspvcprfx com m an d. All
commands run on the PXM45.
1. addcontroller
2. cnfpnni-intf
3. cnfspvcprfx
4. dspspvcprfx
Cards on Which This Command Runs
PXM45
Syntax
cnfspvcprfx -prfx <prefix | “default”>
Syntax Description
Related Commands
dspspvcprfx
Attributes
-prfx The prefix is either a 13-byt e value you enter or the character stri ng “de fault” (to keep the
Cisco factory default).
Log: log State: active Privilege: SUPER_GP