SVC Classical IP and Broadcast

From: gladston@br.ibm.com
Date: Fri Sep 02 2005 - 21:59:17 GMT-3

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SVC configured with Classical IP does not need keyword broadcast to send multicast over the SVC.

Any comments appreciated.

Tests:

interface ATM0/0/0.4 multipoint
description SVC-3 CIP
ip address 69.69.4.6 255.255.255.0
atm esi-address 121212121262.00
atm arp-server nsap 47.00000000000000000000000A.121212121292.00
!
svc nsap 47.00000000000000000000000A.121212121292.00

OSPF adjacency goes up.

On the opposite hand, manually configured SVC does need broadcast keyword:

interface ATM0/0/0.2 multipoint
description SVC-1
ip address 69.69.2.6 255.255.255.0
atm esi-address 121212121261.00
!
svc nsap 47.00000000000000000000000A.121212121291.00
protocol ip 69.69.2.9 broadcast

Rack2R6(config-if-atm-vc)#no protocol ip 69.69.2.9 broadcast
Rack2R6(config-if-atm-vc)#protocol ip 69.69.2.9

*Sep 1 12:07:23: IP: s=69.69.2.6 (local), d=224.0.0.5 (ATM0/0/0.2), len 64, sending broad/multicast, proto=89
*Sep 1 12:07:23: IP: s=69.69.2.6 (local), d=224.0.0.5 (ATM0/0/0.2), len 64, encapsulation failed, proto=89

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