Hot Standby Backup; Configuration - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 27 Configuring BME Multicasting

Hot Standby Backup

BME cards can be set up to provide hot standby backup. Both cards are set up with port 1 connected to
port 2 on the same card to provide the multicasting connection, transmit to receive and receive to
transmit. There is no Y-cabling connection between the cards, and they do not have to be adjacent to
each other.
The addyred command is used to enable hot standby backup between the cards. The addyred command
must be used before any connections are added to the active card. The command will be rejected if used
after connections have been added to the active card.

Configuration

If the multicast tree has a large number of leaf connections, for example, 3000, then the cnfportq
command should be used to configure the Qbin threshold to be greater than needed for half the number
of leaves so as to assure that the multicast group will have no discards. The Qbin default depth is about
1200 cells.
The following is a Qbin example using the cnfportq command:
j4b
Port:
Interface:
Type:
Speed:
SVC Queue Pool Size:
CBR Queue Depth:
CBR Queue CLP High Threshold: 80%
CBR Queue CLP Low Threshold:
CBR Queue EFCI Threshold:
VBR Queue Depth:
VBR Queue CLP High Threshold: 80%
VBR Queue CLP Low Threshold:
VBR Queue EFCI Threshold:
This Command: cnfportq 3.2
SVC Queue Pool Size [0]:
Virtual Terminal
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
VT SuperUser
3.2 [ACTIVE ]
LM-BXM
NNI
1412830 (cps)
0
1200
60%
80%
10000
60%
80%
CD
~ BPX 15 9.3 March 24 2000 16:59 PST
UBR/ABR Queue Depth:
UBR/ABR Queue CLP High Threshold:
UBR/ABR Queue CLP Low Threshold:
UBR/ABR Queue EFCI Threshold:
Cisco BPX 8600 Series Installation and Configuration
Hot Standby Backup
40000
80%
60%
30%
27-7