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melectronics
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MPLS / LDP label mappings for IPv6 are broken after upgrade ROS over v7.16.2

Fri Apr 18, 2025 6:09 pm

Hello to the Community,

I have the problem that my LDP label mappings are broken or that MPLS doesn´t take them after I updated from 7.16.2 to 7.18.2 (7.17 also doesn´t work). Are there some issues that are known?

My MPLS forwarding table looks like this after the upgrade:
Flags: L - LDP
Columns: LABEL, VRF, PREFIX, NEXTHOPS
 #   LABEL  VRF   PREFIX                    NEXTHOPS
 0 L    24  main  fd04:3e5d:dd1e:e025::2    { nh=fe80::be24:11ff:feb1:2edd%e2-CORE02; interface=e2-CORE02 }
 1 L    28  main  fd04:3e5d:dd1e:e0ff::2    { nh=fe80::be24:11ff:feb1:2edd%e2-CORE02; interface=e2-CORE02 }
 2 L    16  main  10.111.255.2              { label=impl-null; nh=198.18.12.2; interface=e2-CORE02 }
 3 L    19  main  198.18.23.0/24            { label=impl-null; nh=198.18.12.2; interface=e2-CORE02 }
 4 L    20  main  198.18.25.0/24            { label=impl-null; nh=198.18.12.2; interface=e2-CORE02 }
 5 L    22  main  fd04:3e5d:dd1e:e023::/64  { nh=fe80::be24:11ff:feb1:2edd%e2-CORE02; interface=e2-CORE02 }
 6 L    23  main  fd04:3e5d:dd1e:e025::/64  { nh=fe80::be24:11ff:feb1:2edd%e2-CORE02; interface=e2-CORE02 }
 7 L    17  main  fd04:3e5d:dd1e:e034::3    { nh=fe80::be24:11ff:feb1:2edd%e2-CORE02; interface=e2-CORE02 }
 8 L    18  main  fd04:3e5d:dd1e:e0ff::3    { nh=fe80::be24:11ff:feb1:2edd%e2-CORE02; interface=e2-CORE02 }
 9 L    21  main  fd04:3e5d:dd1e:e034::/64  { nh=fe80::be24:11ff:feb1:2edd%e2-CORE02; interface=e2-CORE02 }
10 L    25  main  10.111.255.3              { label=17; nh=198.18.12.2; interface=e2-CORE02 }
11 L    26  main  198.18.34.0/24            { label=19; nh=198.18.12.2; interface=e2-CORE02 }
12 L    27  main  10.111.255.4              { label=18; nh=198.18.12.2; interface=e2-CORE02 }
13 L    29  main  fd04:3e5d:dd1e:e034::4    { nh=fe80::be24:11ff:feb1:2edd%e2-CORE02; interface=e2-CORE02 }
14 L    30  main  fd04:3e5d:dd1e:e0ff::4    { nh=fe80::be24:11ff:feb1:2edd%e2-CORE02; interface=e2-CORE02 }
You can see that the IPv4 routes are working as expected but the IPv6 doesn´t.
 
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Larsa
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Re: MPLS / LDP label mappings for IPv6 are broken after upgrade ROS over v7.16.2

Fri Apr 18, 2025 6:27 pm

Any particular reason you need to upgrade to v7.18 when everything’s working fine with 7.16?

If you really do need v7.18 and you’re sure you’ve run into a bug, I’d recommend reporting it to Mikrotik support. You could always try the classic Windows trick, a reboot. 😉
 
melectronics
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Posts: 22
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Location: Germany

Re: MPLS / LDP label mappings for IPv6 are broken after upgrade ROS over v7.16.2

Fri Apr 18, 2025 6:34 pm

Any particular reason you need to upgrade to v7.18 when everything’s working fine with 7.16?

If you really do need v7.18 and you’re sure you’ve run into a bug, I’d recommend reporting it to Mikrotik support. You could always try the classic Windows trick, a reboot. 😉
First: No, I have no reason to upgrade but I want to be on the most acutal version of RouterOS, but I think it´s not always a good idea ;)
Second: I will report it to the Mikrotik support (I think I must do it here in the forum) because there is something not right.

And yes, I have rebooted many times...