High CPU Utilization [7:15272]
Greetings, Any tips on improving high cpu utilization on a Cisco 7500? 4 T1s 1 HSSI 1 TokenRing Port 2 FastEthernet (Bundled, FEC) Its running around 54%, any segmentations would be great. Thanks, Nabil Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15272t=15272 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: High CPU Utilization [7:15272]
Good grief! What the heck do you have running on that?? We have six FastEthernet interfaces, seven T-1 interfaces running frame relay with a total of about 150 PVCs, four ethernet interfaces, a VIP with an ATM Port Adapter, huge access-lists, eigrp with lots of neighbors, two T1 point-to-point interfaces, policy routing, a CIP acting as a tn3270 server with hundreds of connections, ip accounting, etc. and if our router hits even 10% we freak out! My suggestions: 1. If you have long access lists, turn on netflow switching on those interfaces and also use Turbo ACLs (compiled access lists) 2. Use CEF and DCEF where you can, fast switching everywhere else. 3. Send us a copy of show proc cpu when the processor is really busy so we can get a better idea of the cause. 4. Is this device being managed by some other device using SNMP? Sometimes this can cause high CPU usage, but I haven't seen it happen on an RSP before. What RSP are you using? 5. Use passive-interface statements to stop unnecessary routing protocol traffic. 6. Check to see if someone turned on debugging and forgot to turn it off. Okay, that's all I can think off this early in the morning. Good luck! John Nabil Fares 8/8/01 7:54:55 AM Greetings, Any tips on improving high cpu utilization on a Cisco 7500? 4 T1s 1 HSSI 1 TokenRing Port 2 FastEthernet (Bundled, FEC) Its running around 54%, any segmentations would be great. Thanks, Nabil Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15289t=15272 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: High CPU Utilization [7:15272]
Nabil, We recently had the same issue on several 7500's and the High CPU (80-100%)was attributed to code red. However, at the onset of our problems, we did enable CEF and netflow switching on a few interfaces, via recommendations from TAC. That brought the CPU utilization down to 40-50% instantly. After cleaning up the code red issues, CPU utilization tapered down to 25-35%. I love my job!!! Robert -Original Message- From: John Neiberger [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 08, 2001 10:42 AM To: [EMAIL PROTECTED] Subject: Re: High CPU Utilization [7:15272] Good grief! What the heck do you have running on that?? We have six FastEthernet interfaces, seven T-1 interfaces running frame relay with a total of about 150 PVCs, four ethernet interfaces, a VIP with an ATM Port Adapter, huge access-lists, eigrp with lots of neighbors, two T1 point-to-point interfaces, policy routing, a CIP acting as a tn3270 server with hundreds of connections, ip accounting, etc. and if our router hits even 10% we freak out! My suggestions: 1. If you have long access lists, turn on netflow switching on those interfaces and also use Turbo ACLs (compiled access lists) 2. Use CEF and DCEF where you can, fast switching everywhere else. 3. Send us a copy of show proc cpu when the processor is really busy so we can get a better idea of the cause. 4. Is this device being managed by some other device using SNMP? Sometimes this can cause high CPU usage, but I haven't seen it happen on an RSP before. What RSP are you using? 5. Use passive-interface statements to stop unnecessary routing protocol traffic. 6. Check to see if someone turned on debugging and forgot to turn it off. Okay, that's all I can think off this early in the morning. Good luck! John Nabil Fares 8/8/01 7:54:55 AM Greetings, Any tips on improving high cpu utilization on a Cisco 7500? 4 T1s 1 HSSI 1 TokenRing Port 2 FastEthernet (Bundled, FEC) Its running around 54%, any segmentations would be great. Thanks, Nabil Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15297t=15272 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: High CPU Utilization [7:15272]
u can use CEF and DCEF Best Regards, Mohammed Saro Network Engineer GEGA NET +202-4149771/2/3/4 ext.111 - Original Message - From: Nabil Fares To: Sent: Wednesday, August 08, 2001 4:54 PM Subject: High CPU Utilization [7:15272] Greetings, Any tips on improving high cpu utilization on a Cisco 7500? 4 T1s 1 HSSI 1 TokenRing Port 2 FastEthernet (Bundled, FEC) Its running around 54%, any segmentations would be great. Thanks, Nabil Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15434t=15272 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
