I've read through all of the forum conversations regarding buffer misses, but am still confused on what the source of the problem is. We have multiple remote offices with a 2801 router at each office. They all have virtually the same configs. Our network management software, Solarwinds Orion, shows that there are dozens of small and medium buffer misses several times each day.
Here's an example of the show buffers command on the router at the problem site:
Buffer elements:
499 in free list (500 max allowed)
106627925 hits, 0 misses, 0 created
Public buffer pools:
Small buffers, 104 bytes (total 54, permanent 50, peak 169 @ 5w6d):
31 in free list (20 min, 150 max allowed)
31173144 hits, 1417 misses, 1901 trims, 1905 created
110 failures (0 no memory)
Middle buffers, 600 bytes (total 52, permanent 25, peak 138 @ 5w6d):
22 in free list (10 min, 150 max allowed)
1418733 hits, 820 misses, 2668 trims, 2695 created
0 failures (0 no memory)
Big buffers, 1536 bytes (total 50, permanent 50, peak 59 @ 4w0d):
44 in free list (5 min, 150 max allowed)
993911 hits, 5 misses, 15 trims, 15 created
0 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 10, permanent 10):
10 in free list (0 min, 100 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Large buffers, 5024 bytes (total 0, permanent 0):
0 in free list (0 min, 10 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Huge buffers, 18024 bytes (total 0, permanent 0):
0 in free list (0 min, 4 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Interface buffer pools:
Onboard DSPRM Pool buffers, 264 bytes (total 300, permanent 300):
0 in free list (0 min, 300 max allowed)
300 hits, 0 fallbacks
300 max cache size, 300 in cache
1559271 hits in cache, 0 misses in cache
pp00 buffers, 576 bytes (total 1536, permanent 1536):
0 in free list (0 min, 1536 max allowed)
1536 hits, 0 fallbacks
1536 max cache size, 1024 in cache
12180939 hits in cache, 0 misses in cache
Header pools:
Header buffers, 0 bytes (total 768, permanent 768):
256 in free list (128 min, 1024 max allowed)
512 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
512 max cache size, 512 in cache
0 hits in cache, 0 misses in cache
Particle Clones:
1024 clones, 0 hits, 0 misses
Public particle pools:
F/S buffers, 256 bytes (total 768, permanent 768):
256 in free list (128 min, 1024 max allowed)
512 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
512 max cache size, 512 in cache
0 hits in cache, 0 misses in cache
Normal buffers, 1548 bytes (total 768, permanent 768):
768 in free list (128 min, 1024 max allowed)
64 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Private particle pools:
FastEthernet0/3/0 buffers, 1548 bytes (total 128, permanent 128):
0 in free list (0 min, 128 max allowed)
128 hits, 0 fallbacks
128 max cache size, 64 in cache
33159675 hits in cache, 0 misses in cache
FastEthernet0/0 buffers, 1552 bytes (total 512, permanent 512):
0 in free list (0 min, 512 max allowed)
512 hits, 0 fallbacks
512 max cache size, 256 in cache
256 hits in cache, 0 misses in cache
FastEthernet0/1 buffers, 1552 bytes (total 512, permanent 512):
0 in free list (0 min, 512 max allowed)
512 hits, 0 fallbacks
512 max cache size, 256 in cache
256 hits in cache, 0 misses in cache
We do have a couple of routers in the network that have buffer misses a couple of times a month, but this router has buffer misses several times a day.
Any suggestions?
Kevin Damisch
kdamisch@erbs.com
