[j-nsp] 'lib_ifbd->ifbd_curr_num_macs >= adjust_count' failed

[Wojciech Janiszewski]

Hi Lukasz,

IMHO it's a software bug in Layer 2 address learning daemon. You should
send collected core dump file to JTAC, for further analysis.

Regards,
Wojciech Janiszewski


2013/10/21 Lukasz Trabinski <lukasz at trabinski.net>

> Hi
>
> Strange situation on MX960 (Junos 10.4S12) with following scenario:
>
> About 250 customers with static mac addresses and no-mac-learning options
> putted into
>
> routing-instances XXX bridge-domains XXX
>
> with following configuration:
>
> interface xe-xx/x/x.xxx {
>     interface-mac-limit {
>         1;
>         packet-action drop;
>     }
>     static-mac xx:xx:xx:xx:xx:x;
>     no-mac-learning;
>
>
> After flap (up/down) of the 10Gbit/s port
>
> we got:
>
> Oct 17 09:43:55  xx-xx_re0 fpc0 ICHIP(0)_REG_ERR:5 Wi seg ucode discards
> in fabric stream 40 pfe_id 20"
>
> and some traffic to some random ports was dropped.
>
> After that, we decided to deactivate and activate some static mac address
> and no-mac-learning
>
> deactivate routing-instances XXX bridge-domains XXX bridge-options
> interface  aex.xx static-mac xx:xx:xx:xx:xx:x
>
> commit
>
> activate routing-instances XXX bridge-domains XXX bridge-options
> interface  aex.xx static-mac xx:xx:xx:xx:xx:x
>
> commit
>
> After last commit, we got message from syslog:
>
> xx-xx_re0 l2ald[86898]: ../../../../src/junos/usr.**
> sbin/l2ald/l2ald_mlrn_ifbd.h:**175: insist 'lib_ifbd->ifbd_curr_num_macs
> >= adjust_count' failed
>
>
> and core files was dumped into /var/tmp/
>
>
> Solution of this problems was:
>
> deactivate routing-instances XXX bridge-domains XX bridge-options
> commit
> activate routing-instances XXX bridge-domains XX bridge-options
> commit
>
> Question is, is that software or hardware bug? Why flap of one TenGig port
> caused problem with traffic beetween other ports?
>
>
>
> Lukasz
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