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3-62
Cisco ATM Services (AXSM) Configuration Guide and Command Reference for MGX Switches
Release 5.2, Part Number OL-6484-01 Rev. C0, September 2005
Chapter 3 Provisioning ATM Services
General AXSM Configuration Procedures
A root can originate on a CBSM, but it cannot terminate on a CBSM. In other words, parties are not
supported on the CBSMs. This is because P2MP parties are non-persistent, and CBSMs do not
support non-persistent connections.
ABR P2MP connections are not supported.
P2MPs support uni-directional traffic.
Unicast (P2P) traffic has a higher priority than multi-cast (P2MP) traffic. P2MPs have a default
routing priority of 8.
P2MPs do not support CUGs.
In a P2MP connection, the root can be on any port that supports ingress multicasting. The port that
is the root of the connection does not need to support egress multicasting. The port on which the
parties are configured must support both egress and ingress multicasting. For example, if you add a
party on a port that does not support egress multicasting, the connection will not route.
All configuration for P2MP connections is done at the root.You can not do any configuration on the
remote (slave) end of the connection. Any attempt to specify parameters for the remote end will be
blocked.
Table 3-12 summarizes the connection limit on Cisco MGX 8850 (PXM45) and Cisco MGX 8950. The
limits are the same for all switches.
The establishment of a P2MP connection is a two-step process:
1. Set up the master end point, or root, of the connection.
2. Add parties to the root of the connection.
Tip The configuration of SPVCs and SPVPs is very similar. The difference is that SPVPs are assigned VCI
0 and do not use nonzero VCI numbers. An SPVC requires a nonzero VCI.
To configure a P2MP connection, use the following procedure.
Step 1 Establish a configuration session using a user name with GROUP1 privileges or higher.
Step 2 Enter the cc command to change to the AXSM card that will host the root of the P2MP connection.
Step 3 At the AXSM prompt, enter the addcon command to establish the master end-point, or root, of a P2MP
connection, as shown in the following example. Be sure to include the -casttype 1 option to ensure that
this connection is a P2MP connection.
Table 3-12 Connection/Party Limits for Cisco MGX 8850 (PXM45) and Cisco MGX 8950
Connection Type Limits
Total number of connections (P2P and
P2MP)
250,000
Total number of P2MP Connections 5000
Number of parties per P2MP
connection
1000
Number of branches at originating node 128
Total Number of parties per node 10,000
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