Cabletron Systems 04-0053-01 manual Aggregation Tokens, Link on port 7a1

Managing Parallel PNNI Links PNNI Routing

Use the set pnniinterface command to set the administrative weight of a physical link originating from a particular port. The following, is an example of increasing the administrative weight for CBR call setups through the physical link on port 7a1:

SmartSwitch # set pnniinterface
PortNumber()	: 7a1	— Link on port 7a1
AdminWtCBR(5040)	: 100	— Set the weight for CBR connections higher on this link
AdminWtRTVBR(5040)	:
AdminWtNRTVBR(5040)	:
AdminWtABR(5040)	:
AdminWtUBR(5040)	:
AggregationToken(0)	:
RccServCategory(NRTVBR)	:
RccServCategory(NRTVBR)	:
SmartSwitch #

3.3.1Aggregation Tokens

An aggregation token is associated with each physical PNNI link. The value of the token determines how a physical link is advertised to the rest of the network. By default, all physical links (even parallel links) use an aggregation token of zero (0). When physical PNNI links have the same token value, the links are represented as a single logical link within the parent peer group. For example, no matter how many physical links connect peer groups A and B, they are represented within the parent group as a single logical link. Using different token values for physical links causes the links to be represented (and advertised) as separate logical links within the parent group.

Continuing with the earlier example of multi-level topologies, add a second physical PNNI link between peer groups A and B by physically connecting switch SWA2 to switch SWB2. By setting the aggregation token of this physical link to a value different from the physical link connecting switches SWA3 and SWB3, a second logical link appears within the parent group.

For example, the physical link between SWA3 and SWB3 has an aggregation token value of zero (0). Use the set pnniinterface command to change the value of the aggregation token for the physical link between SWA2 and SWB2 to one (1):

SWA2 # set pnniinterface
PortNumber()	: 7b2 — Link on switch SWA2 comes from this port
AdminWtCBR(5040)	:
AdminWtRTVBR(5040)	:
AdminWtNRTVBR(5040)	:
AdminWtABR(5040)	:
AdminWtUBR(5040)	:
AggregationToken(0)	: 1 — Change the value of the aggregation token from the default
RccServCategory(NRTVBR)	:

SWA2 #

Perform the same operation on switch SWB2 in group B:

SWB2 # set pnniinterface
PortNumber()	: 4a3 — Link on switch SWB2 comes from this port
AdminWtCBR(5040)	:
AdminWtRTVBR(5040)	:
AdminWtNRTVBR(5040)	:
AdminWtABR(5040)	:
AdminWtUBR(5040)	:
AggregationToken(0)	: 1 — Change the value of the aggregation token from the default
RccServCategory(NRTVBR)	:
SWB2 #

3-10 SmartSwitch ATM User Guide