Cisco Systems Cisco MGX 8850 Manuale Utente
5-21
Cisco MGX 8850 Routing Switch Command Reference
Release 2.0, Part Number 78-10467-04 Rev C0, October 2001
Chapter 5
PNNI Commands
cnfpnni-intf
cnfpnni-intf
Configure PNNI Interface
—specify administrative weight or logical link aggregation for a port.
The cnfpnni-intf command lets you specify two distinct PNNI parameters. The aggregation token
applies to a logical node, and the administrative weight (AW) applies to a port.
applies to a logical node, and the administrative weight (AW) applies to a port.
Note
Aggregation tokens do not apply in a single-peer group.
Aggregation Tokens
An aggregation token is a marker that indicates which up-links (links going out of the peer group) can
be bundled or aggregated at the next logical level. For example, if four links a, b, c, and d connect to
peer groups X and Y, no aggregation exists for the links by default. The LGNs of these peer groups could
have hypothetical names x02 and y02. They would be connected by a single logical link. You could use
the cnfpnni-intf command to configure aggregation tokens.
be bundled or aggregated at the next logical level. For example, if four links a, b, c, and d connect to
peer groups X and Y, no aggregation exists for the links by default. The LGNs of these peer groups could
have hypothetical names x02 and y02. They would be connected by a single logical link. You could use
the cnfpnni-intf command to configure aggregation tokens.
If you configure the aggregation token of link c as 1, then x02 and y02 would have two logical links.
One link would correspond to aggregation token 0, and the other link would correspond to aggregation
token 1. In summary:
One link would correspond to aggregation token 0, and the other link would correspond to aggregation
token 1. In summary:
An aggregation token is the number of links between a peer group leader and the lowest level of a
PNNI hierarchy. The range for tokens is 1–32.
PNNI hierarchy. The range for tokens is 1–32.
Administrative Weight
The administrative weight (AW) is a number that serves as a cost-based determinant of a route. Each
port in a PNNI network has a default AW for the egress direction. Whether it uses the default AW or an
AW you specify, PNNI adds all the AWs in a prospective route then determines whether the route is too
expensive. For an SPVC, you can specify the maximum cost with the addcon or cnfcon command.
port in a PNNI network has a default AW for the egress direction. Whether it uses the default AW or an
AW you specify, PNNI adds all the AWs in a prospective route then determines whether the route is too
expensive. For an SPVC, you can specify the maximum cost with the addcon or cnfcon command.
You can specify that all classes of service on the port have the same AW, or you can specify an AW for
each service class on the port. If you specify the same AW for all, it overrides the default AW or the
AW you might specify for individual services types.
each service class on the port. If you specify the same AW for all, it overrides the default AW or the
AW you might specify for individual services types.
The AW for a path is the sum, in both directions, of the individual weight of each link on the path. See
for details about AW.
Cards on Which This Command Runs
PXM45
Syntax
cnfpnni-intf <portid>
[-aggregationToken token]
[-awcbr aw]
[-awrtvbr aw]
[-awnrtvbr aw]
[-awabr aw]
[-awubr aw]
[-awall aw]