Hi Chuck - On Sun, May 30, 2010 at 09:01:10PM -0400, Chuck Anderson wrote: > Yes, and I believe the reason why this is the case is because > logical-tunnels use the same MAC address on each end. Since IPv6 uses > the MAC address to generate the link-local address by default, that > may be why they prevent you from configuring inet6 on lt.
Actually, with my setup, it looks like the MACs are unique. It
certainly reuses MAC addresses, but they are unique per "peering" of
logical interfaces. For example:
{master}
l...@mx240-lab01-re0> show arp
MAC Address Address Name Interface Flags
[...snip]
00:22:83:32:cd:35 10.0.4.1 10.0.4.1 lt-2/0/10.6 none
00:22:83:32:cd:34 10.0.4.2 10.0.4.2 lt-2/0/10.7 none
00:22:83:32:cd:34 10.0.4.5 10.0.4.5 lt-2/0/10.1 none
00:22:83:32:cd:35 10.0.4.6 10.0.4.6 lt-2/0/10.0 none
[...snip]
lt-2/0/10.0 and lt-2/0/10.1 are connected, and so are lt-2/0/10.6 and
lt-2/0/10.7. /30s.
For another data point, I've got an SRX 210 (10.1R1.8) doing something
similar, it just uses different addresses:
p...@orb> show arp no-resolve
MAC Address Address Interface Flags
00:26:88:e9:54:80 10.3.7.160 lt-0/0/0.1 none
00:26:88:e9:54:81 10.3.7.161 lt-0/0/0.0 none
00:26:88:e9:54:81 10.3.7.162 lt-0/0/0.2 none
00:26:88:e9:54:80 10.3.7.163 lt-0/0/0.3 none
[...snip]
/31s.
At least for this (simple) setup, it shouldn't be a reason why IPv6
can't be used.
- Mark
--
Mark Kamichoff
[email protected]
http://www.prolixium.com/
signature.asc
Description: Digital signature
_______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
