[c-nsp] Best practice - Core vs Access Router

[Andy B.]

On Wed, Feb 10, 2010 at 8:25 PM, David Freedman
<david.freedman at uk.clara.net> wrote:
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> David Prall wrote:
>> Your drops and flushes counts are the same.
>
> All his drops are flushes, you usually see this when the system and SPD
> can't deal I believe, would be interested if the system buffers for the
> control plane are getting misses or creation churn (sh buff)

#sh buf
Buffer elements:
     11983 in free list (500 max allowed)
     2127613198 hits, 0 misses, 11500 created

Public buffer pools:
Small buffers, 104 bytes (total 1024, permanent 1024, peak 9446 @ 7w0d):
     978 in free list (128 min, 2048 max allowed)
     2986617305 hits, 7649 misses, 9639 trims, 9639 created
     0 failures (0 no memory)
Medium buffers, 256 bytes (total 3000, permanent 3000):
     2992 in free list (64 min, 3000 max allowed)
     505691343 hits, 0 misses, 0 trims, 0 created
     0 failures (0 no memory)
Middle buffers, 600 bytes (total 512, permanent 512):
     511 in free list (64 min, 1024 max allowed)
     267289397 hits, 0 misses, 0 trims, 0 created
     0 failures (0 no memory)
Big buffers, 1536 bytes (total 1000, permanent 1000):
     999 in free list (64 min, 1000 max allowed)
     1211957882 hits, 0 misses, 0 trims, 0 created
     0 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 10, permanent 10):
     10 in free list (0 min, 100 max allowed)
     561291 hits, 0 misses, 0 trims, 0 created
     0 failures (0 no memory)
Large buffers, 9240 bytes (total 8, permanent 8):
     8 in free list (0 min, 10 max allowed)
     21723 hits, 0 misses, 0 trims, 0 created
     0 failures (0 no memory)
Huge buffers, 18024 bytes (total 2, permanent 2, peak 11 @ 7w0d):
     2 in free list (0 min, 4 max allowed)
     637239 hits, 176 misses, 352 trims, 352 created
     0 failures (0 no memory)

Interface buffer pools:
EOBC0/0 buffers, 1524 bytes (total 2400, permanent 2400):
     923 in free list (0 min, 2400 max allowed)
     1477 hits, 0 fallbacks
     1200 max cache size, 956 in cache
     1707029856 hits in cache, 277 misses in cache
IPC buffers, 4096 bytes (total 672, permanent 672):
     609 in free list (224 min, 2240 max allowed)
     25575465 hits, 0 fallbacks, 0 trims, 0 created
     0 failures (0 no memory)
Private Huge IPC buffers, 18024 bytes (total 2, permanent 2):
     2 in free list (1 min, 4 max allowed)
     0 hits, 0 misses, 0 trims, 0 created
     0 failures (0 no memory)
Private Huge buffers, 65280 bytes (total 2, permanent 2):
     2 in free list (1 min, 4 max allowed)
     3806 hits, 0 misses, 0 trims, 0 created
     0 failures (0 no memory)

Header pools: