Cisco BPX 8600 Series, Руководство по установке и настройке

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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 27 Configuring BME Multicasting
BME Operation
Figure 27-1 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/sec, then one should see an egress port stat of 1000
cell/sec on port 1 and an ingress port stat of 1000 cells/sec on port 2, as shown in Figure 27-2.
Figure 27-2 Example of Traffic, One Root and Two Leaves
Adding Connections
Two multicasting groups are shown in Figure 27-3. 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
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