Cisco BPX 8650, Installation And Configuration Manual

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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
Chapter 26 Configuring BME Multicasting
BME Operation
Figure 26-1 Replication of a Root Connection into Three Leaves
Cell Replication Stats
As an example of how traffic appears on the BME, if there is one root at port 1 with two leaves at
port 2, and traffic is passed on the root at 500 cells per sec, then one should see an egress port stat of
1000 cells per sec on port 1 and an ingress port stat of 1000 cells per sec on port 2, as shown in
Figure 26-2.
Figure 26-2 Example of Traffic, One Root and Two Leaves
Adding Connections
Two multicasting groups are shown in Figure 26-3. For purposes of the illustration only a few leaves are
shown for each connection. However, as described previously, each multicasting group could contain up
to 8064 connections.
In this example, the two connections with a VCI of 0 each define a multicasting root connection. Their
VPI defines a broadcasting group.
One group is defined by 2.1.70.0, where the VCI of zero defines the root connection to a BME, and the
VPI of 70 defines a group. All the leaves in that group are of the form 2.2.70.x.
The other group is defined by 2.2.80.0, where the VCI of zero defines the root connection to a BME, and
the VPI of 80 defines a group. All the leaves in that group are of the form 2.1.80.x.
BPX Switch E BPX Switch G
BPX Switch B
BPX Switch A
BPX Switch C
BPX
Switch F
BPX Switch D
root
leaf 3
leaf 2
leaf 1
1
1735
BME
BME
root 500 cells/sec
1000 cells/sec
Port 1
Port 2
leaf 1
500 cells/sec
leaf 2
500 cells/sec
1
1734