LES Monitor Statistics: Default Vccs counter oscillating, too few registered workstations.

Steps to Take:

Explanation: The workstation knows its ATM address, but that address has been de-registered at the Switch/Control-point level. This happens when the workstation is behind a concentrator (ONsemble ATM Workgroup Concentrator) that has been disconnected from the switch for a short time.

Note: You can check whether the station is registered in the ONcore by using the command SHOW ATM_ESI.

1. Wait a few minutes for the new registration to take place.

Clear Table: a lot of SVCs were cleared with Clause 31.

Explanation:

A high-bandwidth (100 Mbps or 155 Mbps) workstation or bridge has tried to call a low-bandwidth workstation (25 Mbps). The call was rejected by the low-bandwidth workstation because the bandwidth specified in the Q2931 parameters (even for a UBR call) was too large. This is normal.

The source or bridge retried to call the destination station with a lower bandwidth/bit-rate successfully. No action required.

Some ATM

stations

cannot

talk

to

LAN

stations

behind

PARALLEL

bridges.

 

 

 

 

 

Explanation:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The

4404B

bridge

has

a

limitation

of

256

ATM

connections.

One would

think

that

 

multiplying

the number of 4404B bridges (in parallel) would multiply the number of

available

connections. Doing so will lead to the problem that only 256 stations can

immediately establish connections

with the

bridges.

 

 

 

 

 

In a configuration with parallel 4404B bridges (bridges

registered to

the

same LAN

Emulation Server, and connected to

the

same

LAN), there may be collisions in

 

terms

of

connections. Indeed, when an ATM

station calls a LAN station

behind the

4404B

bridges,

each

4404B bridge will respond by

establishing a

connection

to the

7-40 ONcore

ATM

Switch/Control

Module: Installation

and

User's

Guide

 

 

 

Page 170
Image 170
3Com 6416SW manual Talk, Stations, Bridges