Issue the show platform health command in order to further identify the platform-specific processes. You can also use a few of these rate limiters on the Supervisor Engine 2: Router#show mls rate-limit Rate Limiter Type Status Packets/s Burst --------------------- ---------- --------- ----- MCAST NON RPF Packets Received by Packet Queue Queue Total 5 sec avg 1 min avg 5 min avg 1 hour avg ---------------------- --------------- --------- --------- --------- ---------- Esmp 48613268 38 39 38 39 DFC#show process cpu PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 22 0 1 0 0.00% 0.00% 0.00% 0 SCP ChilisLC Lis 23 0 1 0 0.00% 0.00% 0.00% 0 http://twaproductions.com/high-cpu/cisco-pix-high-cpu-usage.html
Open a Support Case (Requires a Cisco Service Contract.) Related Cisco Support Community Discussions The Cisco Support Community is a forum for you to ask and answer questions, share suggestions, and Now, I have SVI interfaces for both LANs on teh VSS pair and that is causing traffic from one LAN to jump over to the other VLAN and rightly so because IOS version 12.2(33)SRD and RSP720 with PFC 3cXL View 1 Replies View Related Cisco WAN :: 7600 - High CPU Usage BGP Router Process Sep 12, 2012 I have an issue Router also seen following error.I have not reset the BGP session with ISP yet. https://supportforums.cisco.com/discussion/12283856/my-vss-switch-goes-90-high-cpu-utilization
Both switches reload. This RPF check helps to guarantee that the distribution tree is loop-free. In Cisco IOS Software Release 12.1(13)EW1 and later, the packets are rate-limited so that CPU utilization does not get too high. Wifi, management, printers etc are all on different VLAN Spanning tree has been verified by Cisco TAC & CCNP/CCIE qualified individuals.
For more information on the BGP Next-Hop Address Tracking feature and the procedure to enable/disable or adjust the scan interval, refer to BGP Support for Next-Hop Address Tracking. Rouge wireless bridge is an interesting one that i haven't given thought to, as far as we are aware, wireless is on different VLAN; but rogue will obviously mean it may SYN floods can easily be detected this way because SYN flag presence is indicated in the debugging output: *Mar 3 03:54:40.436: IP: s=192.168.40.53 (Ethernet0/1), d=188.8.131.52 (Ethernet0/0), g=10.200.40.1, len 44, forward *Mar Troubleshooting High Cpu Utilization Caused By Interrupts For example: Switch#show cef not-cef-switched CEF Packets passed on to next switching layer Slot No_adj No_encap Unsupp'ted Redirect Receive Options Access Frag RP 6222 0 136 0 60122 0 0 0
It is only intended for stub networks (networks with hosts only). Cat4k Mgmt Lopri High Cpu The Supervisor Engine 720 with PFC3 supports the rate limit of packets that are redirected to the MSFC for ACL and VACL logging. Avoid the use of log keywords, except during the traffic discovery stage. Get More Info After these steps, the VSS configuration is completed!
Note:If you change a large ACL, you can see this message briefly before the changed ACL is programmed again in the TCAM. Ip Input High Cpu Cisco 6500 However, not all devices respond to an ICMP redirect. The larger your subnet mask is, the greater exposure you have to layer2 attacks like this because ARP is an unauthenticated protocol and a router must at least read a valid This command disables ICMP-unreachable messages, which allows the drop in hardware of all access group-denied packets.
During the traffic discovery stage, you identify the traffic that flows through your network for which you have not explicitly configured ACEs.
For example, this is the output of the netdr capture, which shows that the IPv4 TTL is 1: Source mac 00.00.50.02.10.01 3644 Dest mac AC.A0.16.0A.B0.C0 4092 Protocol 0800 4094 Interface Gi1/8 Command To Check Cpu Utilization In Cisco Switch If for some rare reason all VSL connections are lost between the virtual switch members leaving each virtual switch assumes the role as the active virtual switch, and each virtual switch Ip Input High Cpu The default gateway of PC A points to the VLAN 100 interface IP address.
In other words, if the ACL does not fit into the TCAM, the ACE at the bottom portion of the ACL likely is not programmed in the TCAM. http://twaproductions.com/high-cpu/show-cpu-usage-cisco-switches.html However, the next hop router that enables the Catalyst 4500 to reach the destination is in the same subnet as PC A. That is, the IP address of the device that originates the multicast traffic. This identification enables you to debug the high CPU utilization problems. Troubleshooting High Cpu Utilization On Cisco Switches 6500
Use an enhanced version of STP, such as MST. All rights reserved. If the CPU has already serviced high-priority packets or processes but has more spare CPU cycles for a particular time period, the CPU services the low-priority queue packets or performs background his comment is here This can be IP Input because someone is SNMP walking or polling.
You can see that two main processes, Cat4k Mgmt LoPri and IP Input , primarily use the CPU. Arp Input High Cpu Internetwork Packet Exchange (IPX) traffic that is software-switched on the Supervisor Engine 720 in both Cisco IOS Software and CatOS IPX traffic is also software-switched on the Supervisor Engine 2/Cisco IOS End with CNTL/Z.
Copper SPFs In Cisco ME 6500 series Ethernet switches, the copper SFPs require more firmware interaction than other types of SFPs, which increases the CPU utilization. If the highly active process is K2CpuMan Review , issue the show platform cpu packet statistics command in order to identity the type of traffic that hits the CPU. In this case, use the CPU SPAN in order to determine the traffic that hits the CPU. Show Tcam Utilization 6500 Attachment: vss_shproccpu-log.txt I have this problem too. 0 votes 1 2 3 4 5 Overall Rating: 5 (1 ratings) Log in or register to post comments Replies Collapse all Recent replies
But in order to confirm, SPAN the CPU traffic and be sure that the traffic that you see is the expected traffic. With Network Address Translation (NAT), traffic is handled in this way: On the Supervisor Engine 720: Traffic that requires NAT is handled in hardware after the initial translation. CiscozineB#switch convert mode virtual This command will convert all interface names to naming convention "interface-type switch-number/slot/port", save the running config to startup-config and reload the switch. http://twaproductions.com/high-cpu/show-cpu-usage-cisco-3750.html Note:If you run Catalyst OS (CatOS)-based Catalyst 4500/4000 series switches, refer to the document CPU Utilization on Catalyst 4500/4000, 2948G, 2980G, and 4912G Switches That Run CatOS Software.
Change will take effect after config is saved and switch 1 is reloaded. %VSLP-SW2_SPSTBY-5-RRP_RT_CFG_CHG: Configured priority value is different from operational value. Change will take effect You can expect high CPU utilization for short durations because of the BGP Scanner process on a router that carries a large Internet routing table. This ability of the network to remain stable is critical information that you must understand. Facts: We use 3750x switches, 4 in one stack.
Unless there is a compelling reason otherwise, I set my arp timeout 240 on all SVI / L3 interfaces that are facing a switch. –Mike Pennington Oct 29 '13 at 21:33 We plan to use the same supervisor that we have on the Cat6503E, for minimizing the configuration change on the Doing this, the vss link will need to be changed, due But, if the CPU is high due to traffic being punted to the CPU, you need to determine why the traffic is being punted. cisco ethernet arp share|improve this question asked Oct 26 '13 at 14:26 Cold T 2,0641925 migrated from networkengineering.stackexchange.com Nov 14 '13 at 18:18 This question came from our site for network
Another couple of global commands that are useful for tracking down ports associated with a broadcast storm (mac-move) and flooding (threshold)... These scenarios require the switching ASICs to send packets to the CPU for processing: Packets that are copied to the CPU, but the original packets are switched in hardware An example Manager computers ask the network switch to redirect network traffic for the sleeping computers to themselves. Cisco TAC confirms no known issues for high cpu or ARP bugs for this particular version.
The ID must be the same on each 6500; in this example the ID ‘100' is used: CiscozineA(config)#switch virtual domain 100 Domain ID 100 config will take effect only after the exec command The Supervisor Engine 720 with PFC3-BXL supports up to 1,000,000 entries. The show cef not-cef-switched command shows why packets are punted to the MSFC (receive, ip option, no adjacency, etc) and how many.