11-08-2006 03:13 AM - edited 03-03-2019 02:37 PM
we hv cisco router 2521. it shows 95 to 99% cpu utilization when it recives udp broadcast to declare result of lottery system to all hosts.during that time it give high latency & RTOs for 1 to 2 minutes as our result is broadcasted on every 15 minutes at which router shows latency & high cpu utilization ,,why so ?
11-08-2006 01:49 PM
Hi,
what is dram and flash memory size and how many host has working via thri router?
Sap
11-08-2006 08:44 PM
Below is details of router hardware & the peak time around 700 users connect to the router:
cisco 2520 (68030) processor (revision M) with 14336K/2048K bytes of memory.
Processor board ID 03851311, with hardware revision 00000002
Bridging software.
X.25 software, Version 3.0.0.
Basic Rate ISDN software, Version 1.1.
1 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
2 Low-speed serial(sync/async) network interface(s)
1 ISDN Basic Rate interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read ONLY)
below the stat of cpu when result is broadcasted :
CPU utilization for five seconds: 99%/39%; one minute: 90%; five minutes: 74%
23 80768484 14081200 5735 54.29% 52.48% 43.41% 0 IP Input
11-08-2006 08:51 PM
Hi
The best possible fix for ip input crisis is enabling ip cef on global mode.
But i am afraid whether your router's ios can support cef.
Try enabling the command ip cef under global mode and check .
regds
11-08-2006 08:51 PM
Dear
U can refer to following links based on your condition
Regards!!
Mahesh
11-08-2006 09:50 PM
Please paste the full output of " Show proccess CPU " and " Show process memory "
-amit singh
11-08-2006 11:56 PM
11-09-2006 02:19 AM
Hi,
Try
conf t
ip cef
Try enabling " ip route-cache " under all the interfaces.
Check the below link:
http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a00801c2af3.shtml
Also, Scan your LAn for any worm/viruses.
HTH
-amit singh
11-09-2006 03:04 AM
hi,
as u see in sh proc cp- the ip input is the major thing.
what is the traffic-rate during that time?
(sh int e0).
is this a new application or was it in the past ok ?
a 25xx router has not that performance to handle e.g. 10mb/s -
11-09-2006 10:41 AM
check your buffers
if you have a high influx of traffic and your buffers are low/default, you may be causing the router to create memory buffers at the same time it is receiving a high influx of traffic.
do a sho buff and post the results.
11-09-2006 09:05 PM
hi,
Below is buffer output: when thr is no much load on the router: Plz tell me what i need to clear & configure. I am attaching router configuration file also
SugalLdh#sh buffers
Buffer elements:
499 in free list (500 max allowed)
8363091 hits, 0 misses, 0 created
Public buffer pools:
Small buffers, 104 bytes (total 50, permanent 50):
49 in free list (20 min, 150 max allowed)
35400 hits, 1 misses, 3 trims, 3 created
0 failures (0 no memory)
Middle buffers, 600 bytes (total 25, permanent 25):
23 in free list (10 min, 150 max allowed)
17942 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Big buffers, 1524 bytes (total 150, permanent 50):
150 in free list (5 min, 150 max allowed)
821957 hits, 7556 misses, 1180 trims, 1280 created
2280 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 10, permanent 10):
10 in free list (0 min, 100 max allowed)
27525 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:
Ethernet0 buffers, 1524 bytes (total 32, permanent 32):
8 in free list (0 min, 32 max allowed)
47 hits, 7 fallbacks
8 max cache size, 8 in cache
38286 hits in cache, 27 misses in cache
BRI0 buffers, 1524 bytes (total 4, permanent 4):
3 in free list (0 min, 4 max allowed)
3 hits, 0 fallbacks
1 max cache size, 1 in cache
0 hits in cache, 0 misses in cache
BRI0:1 buffers, 1524 bytes (total 16, permanent 16):
12 in free list (0 min, 16 max allowed)
12 hits, 0 fallbacks
4 max cache size, 4 in cache
0 hits in cache, 0 misses in cache
BRI0:2 buffers, 1524 bytes (total 16, permanent 16):
12 in free list (0 min, 16 max allowed)
12 hits, 0 fallbacks
4 max cache size, 4 in cache
0 hits in cache, 0 misses in cache
Serial0 buffers, 1524 bytes (total 32, permanent 32):
6 in free list (0 min, 32 max allowed)
136216 hits, 552798 fallbacks
8 max cache size, 5 in cache
2272903 hits in cache, 688989 misses in cache
Serial1 buffers, 1524 bytes (total 32, permanent 32):
7 in free list (0 min, 32 max allowed)
14267 hits, 266752 fallbacks
8 max cache size, 8 in cache
2776766 hits in cache, 280994 misses in cache
Serial2 buffers, 1524 bytes (total 8, permanent 8):
6 in free list (0 min, 8 max allowed)
8 hits, 0 fallbacks
0 max cache size, 0 in cache
0 hits in cache, 8 misses in cache
Serial3 buffers, 1524 bytes (total 8, permanent 8):
6 in free list (0 min, 8 max allowed)
6 hits, 0 fallbacks
0 max cache size, 0 in cache
0 hits in cache, 6 misses in cache
CD2430 I/O buffers, 1524 bytes (total 20, permanent 20):
10 in free list (0 min, 20 max allowed)
10 hits, 0 fallbacks
11-13-2006 06:51 AM
Try removing "ip route-cache flow" from "interface Serial1"
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