Greetings, We have been experiencing a problem that we believe is something going haywire with a 1760 router (show ver is below). Essentially, over time (one to three weeks) the router's CPU utilization creeps up and begins spiking at 90 to 100% until, if left untreated via RELOAD it gets progressively worse until pegging at 100% making even a telnet visit to type the word "reload" a 10 minute lesson in patience. The problem first becomes noticed by the end user when they start having problems with their 30 or so VoIP phones which are more sensitive to network issues. Running nearly idle this evening (processing around 50kbps) the cpu was still showing 18 to 22% [if memory serves] and after reload it basically flatlined in the expected 1-3% range. Whack-a-mole fix it attempts have included: Loading a different IOS version onto the router: I believe 12.3(18) [c1700-k9o3sy7-mz.123-18.bin] was the original and it is still available in flash but we now show it loading 12.4(1c) [see below] after the IOS change. Replacing the router itself once when the IOS change didn't help. Packet traces taken on the LAN side of the network do not indicate any significant broadcast or other suspect traffic. The following line is at the affected location in the SHOW VER output but not on the stable router's SHOW VER output: "ROM: C1700 Software (C1700-K9O3SY7-M), Version 12.3(18), RELEASE SOFTWARE (fc3)" Any help or advice is greatly appreciated! SHOW VERSION output
Cisco IOS Software, C1700 Software (C1700-IPBASE-M), Version 12.4(1c), RELEASE SOFTWARE (fc1) Technical Support: <http://www.cisco.com/techsupport> http://www.cisco.com/techsupport Copyright (c) 1986-2005 by Cisco Systems, Inc. Compiled Wed 26-Oct-05 06:46 by evmiller ROM: System Bootstrap, Version 12.2(7r)XM2, RELEASE SOFTWARE (fc1) ROM: C1700 Software (C1700-K9O3SY7-M), Version 12.3(18), RELEASE SOFTWARE (fc3) ********** uptime is 9 minutes System returned to ROM by reload at 00:10:01 UTC Sat May 3 2008 System restarted at 00:14:05 UTC Sat May 3 2008 System image file is "flash:c1700-ipbase-mz.124-1c.bin" Cisco 1760 (MPC860P) processor (revision 0x851) with 55706K/9830K bytes of memory. Processor board ID FOC09512DZZ (2976419533), with hardware revision 0000 MPC860P processor: part number 5, mask 2 1 FastEthernet interface 1 Serial interface WIC T1-DSU 32K bytes of NVRAM. 32768K bytes of processor board System flash (Read/Write) Configuration register is 0x2102 COPY OF CONFIGURATION (EDITED TO GET G RATING) ;-) note: configuration mostly provided by customer's VAR whom we are working with on the problem. Using 2816 out of 29688 bytes version 12.4 service timestamps debug uptime service timestamps log uptime service password-encryption ! hostname xxxxxxxxxxxxx ! boot-start-marker boot system flash c1700-ipbase-mz.124-1c.bin boot-end-marker ! no logging buffered enable password 7 xxxxxxxxxxxxxxx ! no aaa new-model ! resource policy ! memory-size iomem 15 mmi polling-interval 60 no mmi auto-configure no mmi pvc mmi snmp-timeout 180 ip subnet-zero ip cef ! ! no ip dhcp use vrf connected ip dhcp excluded-address 10.100.1.1 ! ip dhcp pool Phones network 10.100.1.0 255.255.255.0 default-router 10.100.1.1 option 66 ascii "xxxxxxxxxxxx" dns-server xxxxxxxxxxxx xxxxxxxxxxxx lease 60 ! ! ip domain name xxxxxxxxxxxxxx ip name-server xxxxxxxxxxxx ip name-server xxxxxxxxxxxx ! ! class-map match-all VOIP-CONTROL match access-group 182 match access-group 102 class-map match-all VOIP-RTP match access-group 181 match access-group 102 ! ! policy-map QOS-Policy-1.5M-Internet class VOIP-RTP priority 1000 class VOIP-CONTROL bandwidth 64 class class-default fair-queue ! ! ! interface FastEthernet0/0 description Connection to LAN no ip address speed 100 full-duplex ! interface FastEthernet0/0.1 description Private data network VLAN ! interface FastEthernet0/0.2 description Voice network VLAN encapsulation dot1Q 2 ip address 10.100.1.1 255.255.255.0 ip nat inside no snmp trap link-status ! interface FastEthernet0/0.3 description Public address VLAN encapsulation dot1Q 3 ip address xxxxxxxxxxxxxxx 255.255.255.248 no snmp trap link-status ! interface Serial0/0 description T1 Uplink bandwidth 1536 ip address xxxxxxxxxxxx 255.255.255.252 ip nat outside service-policy output QOS-Policy-1.5M-Internet ! ip classless ip route 0.0.0.0 0.0.0.0 Serial0/0 ! no ip http server ip nat translation udp-timeout 602 ip nat inside source list 10 interface Serial0/0 overload ip nat inside source static tcp 10.100.1.15 80 interface Serial0/0 33000 ! access-list 10 permit 10.100.1.0 0.0.0.255 access-list 102 permit udp 10.100.1.0 0.0.0.255 any access-list 102 permit udp any 10.100.1.0 0.0.0.255 access-list 181 permit udp any any dscp ef access-list 182 permit udp any any dscp af31 snmp-server community xxxxxxxxxxxx RO ! control-plane ! ! ntp clock-period 17208021 ntp server xxxxxxxxxxxx prefer end _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/