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Community Member

HSSI buffers

Hello,

I have two almost identical 3662 routers with HSSI card. "show buffers" shows me different buffers count for HSSI card on the routers. Those router that has lower value uses Normal particle pool more intensively and continuosly increases "throttle" counter on all interfaces. Those, that have higher value, almost don't use normal particle pool and don't have a problem with "throttle". Can I manage somehow the count of buffers allocated for HSSI card?

ThanksBAD ROUTER:

Public particle pools:

<skipped>

Normal buffers, 1548 bytes (total 768, permanent 768):

758 in free list (128 min, 1024 max allowed)

58010039 hits, 596861 misses, 93529 trims, 93529 created

15837 failures (0 no memory)

Private particle pools:

<skipped>

Hssi1/0 buffers, 1548 bytes (total 120, permanent 120):

0 in free list (0 min, 120 max allowed)

120 hits, 0 fallbacks

120 max cache size, 1 in cache

388006443 hits in cache, 31619514 misses in cache

10 buffer threshold, 183605 threshold transitions

GOOD ROUTER:

Public particle pools:

<skipped>

Normal buffers, 1548 bytes (total 768, permanent 768):

768 in free list (128 min, 1024 max allowed)

8632 hits, 0 misses, 0 trims, 0 created

0 failures (0 no memory)

Private particle pools:

<skipped>

Hssi4/0 buffers, 1548 bytes (total 256, permanent 256):

0 in free list (0 min, 256 max allowed)

256 hits, 0 fallbacks

256 max cache size, 128 in cache

10 buffer threshold, 1668 threshold transitions

2 REPLIES
Bronze

Re: HSSI buffers

Do the boxes have different amounts of total memory? Do you have "memory-size iomem" configured differently on each?

Community Member

Re: HSSI buffers

Yes they do. "BAD" has 111616K/19456K; "GOOD" has 252928K/9216K.

Also "BAD" router has 12.1.14 version but "GOOD" has 12.0.5.T.XK1 version.

I have tried Bad router with 12.2 but it has the same problem. But when I installed 12.0.5.T.XK1 on the Bad router, it allocated 256 buffers for HSSI interface and stopped to use them from Normal particle pool. So the problem seems to be version related.

I wonder why newer versions has only 120 buffers alocated for HSSI interface and how to fix this problem ?

Thanks

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