Aggregation Tokens - Cabletron Systems SmartSwitch 6500 User Manual

PNNI Routing
Use the
set pnniinterface
port. The following is an example of increasing the administrative weight for CBR call setups through the physical
link on port 7a1:
Smart6500_1 # set pnniinterface
PortNumber()
AdminWtCBR(5040)
AdminWtRTVBR(5040)
AdminWtNRTVBR(5040)
AdminWtABR(5040)
AdminWtUBR(5040)
AggregationToken(0)
RccServCategory(NRTVBR)
RccServCategory(NRTVBR)
Smart6500_1 #
4.3.1

Aggregation 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
command to change the value of the aggregation token for the physical link between SWA2 and SWB2
pnniinterface
to one (1):
A2 # set pnniinterface
PortNumber()
AdminWtCBR(5040)
AdminWtRTVBR(5040)
AdminWtNRTVBR(5040)
AdminWtABR(5040)
AdminWtUBR(5040)
AggregationToken(0)
RccServCategory(NRTVBR)
A2 #
Perform the same operation on switch SWB2 in group B:
B2 # set pnniinterface
PortNumber()
AdminWtCBR(5040)
AdminWtRTVBR(5040)
AdminWtNRTVBR(5040)
AdminWtABR(5040)
AdminWtUBR(5040)
AggregationToken(0)
RccServCategory(NRTVBR)
B2 #
command to set the administrative weight of a physical link originating from a particular
: 7a1
: 100
:
:
:
:
:
:
:
: 7b2 < Link on switch SWA2 comes from this port
:
:
:
:
:
: 1
:
: 4a3 < Link on switch B2 comes from this port
:
:
:
:
:
: 1
:
< Link on port 7a1
< Set the desirability for CBR connections higher on this link
< Change the value of the aggregation token from the default
< Change the value of the aggregation token from the default
Managing Parallel PNNI Links
set
SmartSwitch 6500 User Guide 4-9