[j-nsp] EX4500 dot1q-tunneling layer2-protocol-tunneling (L2PT)
juniper-nsp at ml.karotte.org
Mon Feb 13 07:42:44 EST 2012
I finally succeeded in getting dot1q-tunneling with L2PT working over
VPLS and a mixed Juniper/Cisco switch infrastructure. The switching
path goes like this:
test-server1 -- EX4200 -- MX960 == MX960 == MX960 -- EX4500 -- Cisco3560 -- test-server2
--- Q-in-Q Tunneling with L2PT
I tried to forward LLDP/CDP traffic to test the tunneling.
I had it all working except the EX4500 which for no apparent reason
didn't forward the LLDP/CDP packets.
I then read in the release notes that dot1q tunneling with L2PT is
only supported in JunOS >= 11.2 on EX4500:
(Why it isn't supported on EX8200 is beyond me)
So I upgraded to 11.2R5.4 but still no success. The EX4500 wouldn't
forward the packets.
I had to configure
set vlans qinq-vlan dot1q-tunneling layer2-protocol-tunneling all
on the EX4500 even though it was just TRANSPORTING the packets!
Suddenly it all works.
On Cisco the frames are just forwarded as expected. I can't imagine
why Juniper would drop these frames when they just had to enter on one
port and exit on another port.
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