If you disable automatic failover and a primary ATM OC-3 card failure

 

occurs, you must use the command in step 1 to make the redundant

 

ATM OC-3 card active.

 

There is a configurable feature called the loss of signalling delay. The

 

default is 0 seconds, and the maximum is 60 seconds. PHY failover can

 

take from 0 through 60 seconds when the automatic failover feature is

 

enabled. The command is:

 

CB5000> set atm <slot>.1 loss_of_signalling_delay <seconds>

 

 

Configuring IGMP

IGMP snooping must be enabled on both the ATM backbone

Snooping

SwitchModule and the vbridge on which you plan to use IGMP

Parameters

snooping.

 

 

To enable IGMP snooping on the ATM Backbone SwitchModule:

 

Before you can enable IGMP snooping, you must set up an IP address

 

for each vbridge that is configured on the ATM Backbone

 

SwitchModule. You must setup a subnet mask before you can assign

 

an IP address. The correct commands are:

 

SET IP SUBNET_MASK <FF.FF.FF>.00 VBRIDGE 1

 

SET IP IP_ADDRESS <XXX.XXX.XX>.00 VBRIDGE 1

 

SAVE

ALL

(This saves the address parameters for vbridge 1.)

 

SHOW

IP

(This displays the IP address you just created for vbridge 1.)

1

Enable IGMP snooping on the ATM Backbone SwitchModule.

 

For example, the following command enables IGMP snooping on an

 

ATM Backbone SwitchModule in slot 9:

CB5000> set module 9.1 igmp_snooping enable

2Enable IGMP snooping on a vbridge configured on the ATM Backbone SwitchModule.

For example, the following command enables IGMP snooping on vbridge 1 on the ATM Backbone SwitchModule in slot 9:

CB5000> set vbridge 1 igmp_snooping mode enable

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3Com 5000 ATM manual Configuring Igmp, Snooping, CB5000 set atm slot.1 lossofsignallingdelay seconds