[f-nsp] CAM IPv6 partition warning even if cam partition not full
Dennis op de Weegh
info at bitency.nl
Sun Sep 30 08:59:36 EDT 2018
Hi Andreas,
Which cam profile do you use?
Can you post your config?
Maybe the same bug in 2016:
https://puck.nether.net/pipermail/foundry-nsp/2016-March/009467.html
Kind regards/Met vriendelijke groet,
Dennis op de Weegh
Bitency
Hoge Ham 24
5104JG Dongen
Kvk nummer: 20144338
BTW nummer: NL213538519B01
W: www.bitency.nl
E: info at bitency.nl
T: +31 (0)162 714066
-----Oorspronkelijk bericht-----
Van: foundry-nsp <foundry-nsp-bounces at puck.nether.net> Namens Andreas Schlee
Verzonden: zondag 30 september 2018 10:19
Aan: foundry-nsp at puck.nether.net
Onderwerp: [f-nsp] CAM IPv6 partition warning even if cam partition not full
Hi, on our MLXe running IronWare 6.0.0f we're getting CAM IPv6 partition warnings:
>sh log | in CAM
Sep 26 11:43:25:A:CAM IPv6 partition warning: total 65536 (reserved 0), free 51, slot 3, ppcr 1 Sep 26 11:38:25:A:CAM IPv6 partition warning: total 65536 (reserved 0), free 44, slot 3, ppcr 1 Sep 26 11:33:25:A:CAM IPv6 partition warning: total 65536 (reserved 0), free 22, slot 3, ppcr 1 Sep 26 11:28:25:A:CAM IPv6 partition warning: total 65536 (reserved 0), free 62, slot 3, ppcr 1 Sep 26 11:23:25:A:CAM IPv6 partition warning: total 65536 (reserved 0), free 100, slot 3, ppcr 1 Sep 26 11:18:25:A:CAM IPv6 partition warning: total 65536 (reserved 0), free 43, slot 3, ppcr 1
But the cam partition usage tells us there is still space free:
>show cam-partition usage slot 3
Slot 3 XPP20SP 0:
[...]
[IPV6] 65536(size), 10218(free), 084.40%(used)
:SNet 0: 10470(size), 10207(free), 002.51%(used)
:SNet 1: 51359(size), 5(free), 099.99%(used)
:SNet 2: 3268(size), 0(free), 100.00%(used)
:SNet 3: 377(size), 0(free), 100.00%(used)
:SNet 4: 45(size), 0(free), 100.00%(used)
:SNet 5: 9(size), 0(free), 100.00%(used)
:SNet 6: 2(size), 1(free), 050.00%(used)
:SNet 7: 2(size), 2(free), 000.00%(used)
:SNet 8: 2(size), 2(free), 000.00%(used)
:SNet 9: 2(size), 1(free), 050.00%(used)
>show ipv6 route sum
IPv6 Routing Table - 55032 entries:
122 connected, 0 static, 0 RIP, 0 OSPF, 54910 BGP, 0 ISIS
Number of prefixes:
/16:1 /19:2 /20:11 /21:3 /22:6 /23:4 /24:21 /25:6 /26:15 /27:17
/28:82 /29:2292 /30:210 /31:123 /32:10733 /33:697 /34:595 /35:419
/36:2143 /37:403 /38:473 /39:166 /40:2878 /41:379 /42:579 /43:135
/44:4056 /45:343 /46:1455 /47:521 /48:25424 /50:4 /54:9 /56:39
/64:243 /112:1 /123:1 /124:5 /125:7 /126:489 /127:9 /128:33 Nexthop Table Entry - 120 entries
So the warning tells us a highly different amount of free entries compared to the log: 10218 <-> 51 We checked the usage about 2 minutes after the warning appeared in the log.
Anyone out there facing or faced the same issue? What information should we trust now: the warning in the log or the cam-partition usage?
Another question would be: what are the "SNet" entries we see in the cam-partition, and why are some of them this small (size of 2)?
Finally, the manual says about partition sharing:
Supernet TCAM partition sharing
In Brocade NetIron software versions prior to 03.2.00, TCAM resources could not be shared between the 32 levels of the IP Forwarding Information Base (FIB). Beginning with 03.2.00, TCAM allocation is optimized for dynamic allocation of resources to each level. If one level runs out of TCAM resources, it can obtain resources that have been allocated to another level but are unused. This feature applies to IPv4 and Layer 3 VPN routes.
Does that mean that there is no sharing between the supernets in IPV6 CAM?
Regards,
Andreas Schlee
--
velia.net Internetdienste GmbH * Hessen-Homburg-Platz 1 * 63452 Hanau
Geschäftsführer: Franz G. Köhler, Arek Akilli * AG Hanau * HRB 7588
Tel: +49 6181 1898119 * http://www.velia.net
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