Есть предположение, что происходит переполнение очереди. Нет уверенности, что стоит увеличивать очередь.
router#sh buffers
Buffer elements:
1116 in free list (500 max allowed)
4771155 hits, 0 misses, 1119 created
Public buffer pools:
Small buffers, 104 bytes (total 101, permanent 50, peak 153 @ 4d22h):
39 in free list (20 min, 150 max allowed)
2625015 hits, 2650 misses, 2221 trims, 2272 created
794 failures (0 no memory)
Middle buffers, 600 bytes (total 92, permanent 25, peak 103 @ 5d20h):
85 in free list (10 min, 150 max allowed)
916606 hits, 767 misses, 757 trims, 824 created
85 failures (0 no memory)
Big buffers, 1536 bytes (total 50, permanent 50):
49 in free list (5 min, 150 max allowed)
835237 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, 20 max allowed)
3 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 1, permanent 0, peak 3 @ 5d17h):
1 in free list (0 min, 4 max allowed)
3867 hits, 2 misses, 62 trims, 63 created
0 failures (0 no memory)
Interface buffer pools:
CD2430 I/O buffers, 1536 bytes (total 0, permanent 0):
0 in free list (0 min, 0 max allowed)
0 hits, 0 fallbacks
Header pools:
Header buffers, 0 bytes (total 137, permanent 128, peak 137 @ 1w0d):
9 in free list (10 min, 512 max allowed)
125 hits, 3 misses, 0 trims, 9 created
0 failures (0 no memory)
128 max cache size, 128 in cache
11404 hits in cache, 0 misses in cache
Particle Clones:
1024 clones, 132453 hits, 0 misses
Public particle pools:
F/S buffers, 256 bytes (total 384, permanent 384):
128 in free list (128 min, 1024 max allowed)
256 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
256 max cache size, 256 in cache
132453 hits in cache, 0 misses in cache
Normal buffers, 1548 bytes (total 512, permanent 512):
384 in free list (128 min, 1024 max allowed)
132807 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
128 max cache size, 128 in cache
0 hits in cache, 0 misses in cache
Private particle pools:
IDS SM buffers, 240 bytes (total 128, permanent 128):
0 in free list (0 min, 128 max allowed)
128 hits, 0 fallbacks
128 max cache size, 128 in cache
0 hits in cache, 0 misses in cache
Ethernet1/0 buffers, 1536 bytes (total 96, permanent 96):
0 in free list (0 min, 96 max allowed)
96 hits, 0 fallbacks
96 max cache size, 64 in cache
93860966 hits in cache, 132519 misses in cache
FastEthernet0/0 buffers, 1548 bytes (total 192, permanent 192):
0 in free list (0 min, 192 max allowed)
192 hits, 0 fallbacks
192 max cache size, 128 in cache
75474784 hits in cache, 0 misses in cache
FastEthernet0/1 buffers, 1548 bytes (total 192, permanent 192):
0 in free list (0 min, 192 max allowed)
192 hits, 0 fallbacks
192 max cache size, 128 in cache
76157731 hits in cache, 0 misses in cache
>2651XM + NM-1E, 12.4(3) Advanced IP Services
>
>На модуле NM-1E имеем следующее (за несколько дней ignored доходит до 20
>- 30 тысяч):
>
> MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
> reliability 255/255, txload 4/255, rxload 14/255
> Encapsulation ARPA, loopback not set
> Keepalive not set
> ARP type: ARPA, ARP Timeout 04:00:00
> Last input 00:00:12, output 00:00:00, output hang never
> Last clearing of "show interface" counters 07:28:57
> Input queue: 0/75/3562/0 (size/max/drops/flushes); Total output drops: 0
> Queueing strategy: fifo
> Output queue: 0/40 (size/max)
> 5 minute input rate 552000 bits/sec, 173 packets/sec
> 5 minute output rate 160000 bits/sec, 156 packets/sec
> 1158632 packets input, 647254714 bytes, 0 no
>buffer
> Received 470 broadcasts, 0 runts, 0 giants,
>0 throttles
> 8168 input errors, 1 CRC, 0 frame,
>0 overrun, 8167 ignored
> 0 input packets with dribble condition detected
>
> 939673 packets output, 174234651 bytes, 0 underruns
>
> 0 output errors, 0 collisions, 0 interface
>resets
> 0 babbles, 0 late collision, 0 deferred
>
> 0 lost carrier, 0 no carrier
> 0 output buffer failures, 0 output buffers
>swapped out