Avaya M770 Manuel D’Utilisation

Chapter 4

Managing Miscellaneous Commands

Avaya M770 ATM Switch User’s Guide

37

The destination IP address, the router address, and the network mask are displayed 
for each entry in the IP route cache. The default router address is also displayed. 
This uses the M770 ATM Switch’s IP gateway address.
To display the contents of the M770 ATM Switch’s IP route cache, use the

ip routecache

 

command.

Connection Admission Control (CAC)

The M770 ATM Switch carries out Connection Admission Control (CAC) on both 
the input and output ports to ensure that there is enough bandwidth to allow the 
call to be accepted. 
Bandwidth is reserved in the following manner for the different service categories:
•

CBR -Bandwidth equal to Peak Cell Rate (PCR) requested will be allocated, if 
available.

•

VBR -Bandwidth allocation will use the Simple Generic CAC (SGCAC) 
algorithm described in PNNI 1.0. This is based on PCR and SCR (Sustainable 
Cell Rate) requested.

•

UBR -UBR calls will always be accepted (assuming the limit on active VCs has 
not been reached). 

If you have any rate limit set on a port then CAC will not allow you to set up 

connections which could exceed the set limit. 

All new circuits through the switch are allocated according to the SGCAC, this 
provides the optimum usage of the bandwidth through your switch.

Command:

M15-155s8:/>ip routecache

Output:

IP route cache entries

--------------------------------

Destination

Mask

Router

Interface

127.0.0.0

255.0.0.0

(local)

m-spv

149.49.34.0

255.255.255.0

(local)

lec

default

*

149.49.34.5

lec