From: sabrina pittarel (sabri_esame@yahoo.com)
Date: Thu Nov 30 2006 - 04:48:14 ART
Hi Antonio,
in my understanding the best way of using the broadcast keyword is
once per DLCI, so it doesn't really matter if you associate it to the map
statement for the link local or the global address.
1) and 2) are equivalent
3) will cause the interface to send 2 copies of the same broadcast/mcast
packet out of the dlci. (2 copies out of 501 and 2 others out of 504)
Sabrina
----- Original Message ----
From: Antsnio Soares <amsoares@convex.pt>
To:
ccielab@groupstudy.com
Sent: Wednesday, November 29, 2006 5:06:48 PM
Subject:
IPv6 Over Frame-Relay
Hello Group,
When configuring IPv6 Over Frame-Relay
in order to support RIPng or OSPFv3,
i've seen different types of
configurations related with the broadcast
option. Suppose that we have R5 as
the Hub and R1 and R4 as Spokes. For
example in R5, we have 3 options:
Option #1:
R5#sh runn int s0/0 | inc ipv6
ipv6 address 2001:176:1:145::5/64
ipv6 address FE80::5 link-local
ipv6 rip ripng enable
frame-relay map ipv6
FE80::1 501 broadcast
frame-relay map ipv6 FE80::4 504 broadcast
frame-relay
map ipv6 2001:176:1:145::1 501
frame-relay map ipv6 2001:176:1:145::4 504
R5#
Option #2:
R5#sh runn int s0/0 | inc ipv6
ipv6 address 2001:176:1:145::5/64
ipv6 address FE80::5 link-local
ipv6 rip ripng enable
frame-relay map ipv6
FE80::1 501
frame-relay map ipv6 FE80::4 504
frame-relay map ipv6
2001:176:1:145::1 501 broadcast
frame-relay map ipv6 2001:176:1:145::4 504
broadcast
R5#
Option #3:
R5#sh runn int s0/0 | inc ipv6
ipv6 address
2001:176:1:145::5/64
ipv6 address FE80::5 link-local
ipv6 rip ripng enable
frame-relay map ipv6 FE80::1 501 broadcast
frame-relay map ipv6 FE80::4 504
broadcast
frame-relay map ipv6 2001:176:1:145::1 501 broadcast
frame-relay
map ipv6 2001:176:1:145::4 504 broadcast
R5#
The 3 options are valid but I
usually choose option #1. The debugs show me
the following in R5:
RIPng:
Sending multicast update on Serial0/0 for ripng
src=FE80::5
dst=FF02::9 (Serial0/0)
sport=521, dport=521, length=292
(...)
We
know that RIPng updates are sent using the link-local address, in this
case
FE80::5. And we know that FF02::9 represents the all-RIP-routers
multicast
address. So the router will pick-up the pvc's with broadcast
capabilities and
will send these packets.
My question is: which option is recommended and why.
Thanks,
AMS
This archive was generated by hypermail 2.1.4 : Fri Dec 01 2006 - 08:05:49 ART