Cabletron Systems 04-0053-01 User Manual

4-6   SmartSwitch ATM User Guide

UNI Routes

  Routing

Enter the 

 command to check that the UNI route was added.

SmartSwitch # show atmroute

AddressNumber(ALL)                        :

No. Port Route Address                                            Type Protocol

================================================================================

1   7B4  39:00:00:00:00:00:00:00:00:00:14:41:80:00:20:d4:14:41:80   I   MGMT

2   7B4  39:00:00:00:00:00:00:00:00:00:14:41:80:00:20:d4:14:41:81   I   MGMT

3    --  39:00:00:00:00:00:00:00:00:00:14:59:00                     I   PNNI

4   7A2  39:00:00:00:00:00:00:00:00:00:14:59:00:00:11:22:33:44:55   I   MGMT  

5    --  39:00:00:00:00:00:00:00:00:00:28:e9:80                     I   PNNI

6    --  39:00:00:00:00:00:00:00:00:00:28:f5:00                     I   PNNI

7   7B4  47:00:79:00:00:00:00:00:00:00:00:00:00:00:a0:3e:00:00:01   I   MGMT

8   5B2  52:00:00:00:00:00:00:00:00:00:14:51:80                     I   MGMT

SmartSwitch #

The UNI route appears in the table as 

, with Protocol Type of 

 (management).

For UNI routes to work with certain devices, ILMI may also need to be disabled 
on the ATM SmartSwitch. Use the 

 command to disable ILMI on 

the ATM SmartSwitch on a per-port basis.

4.3.1

UNI Link Timing

By default, if a UNI link loses connectivity, the link fails after three (3) seconds. This short amount of time is designed 
as a buffer in case of minor latency. By waiting three seconds before releasing resources and tearing down the 
connection, a minor latency occurrence (less than three seconds) will not bring down the route.

However, certain time-sensitive implementations may require that link fail occurs either immediately or after a longer 
period of time than three seconds. Use the 

 command to control the time required for the 

SmartSwitch ATM switch to assume a UNI route has failed. 

For example, a SmartSwitch ATM switch is connected to two UNI uplinks (one active, one standby) through two 
separate ports. One switch port is connected to the active UNI uplink and the other switch port is connected to the 
standby UNI uplink. To configure the switch to immediately recognize any lapse in traffic on the active UNI uplink 
port as a downed link, enter the following on the SmartSwitch ATM switch:

SmartSwitch # set linkmonitortimeout

TimeoutValue(3)                           : 0  

SmartSwitch #

If the active UNI uplink fails-over to the standby UNI uplink, the SmartSwitch ATM switch port connected to the failed 
active uplink immediately frees up all resources, and begins accepting traffic on the port connected to the standby UNI 
uplink.

Notice that the 

 command controls the 

 on a switch-wide basis (not a per-port 

basis).