Cisco Switching/Routing :: 4900M - Facing High Frequent Interfaces Flaps
Feb 18, 2013
We are facing issue with highly frequent interface flaps on Cisco 4900M switch only for module WS-X4920-GB-RJ45. Strange thing is no complaint from the users/server teams for any traffic interruption.
Switch: Cisco WS-C4900M
Line card: WS-X4920-GB-RJ45
IOS image is cat4500e-ipbase-mz.122-53.SG4.bin
There are several other smilar model & linecard/inventory of switches with exactly same IOS image, however there are no issues with them.
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Dec 11, 2012
I am having issues with frequent bgp flaps on the Cisco 7200 series router from past 1 week. I have raised a ticket with ISP but couldn't get any resolution from them as the flap is for about 2min.When ever we see BGP flap, we are not able to ping the remote end IP, Also at that point we drops on the interface connected to ISP.
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May 3, 2012
we have a pair of 7609 routers working in Active Standby mode. The version of routers are :- Cisco IOS Software, c7600rsp72043_rp Software (c7600rsp72043_rp-ADVIPSERVICESK9-M), Version 12.2(33)SRD4, RELEASE SOFTWARE (fc2)
Quiet frequently we are getting High CPU load problems on our router and this load comes down below 10 % automatically.
I am attaching the Show tech support for your kind consideration.
Similar issue was reported yesterday as well for which i have attached SH tech suppot.
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Mar 12, 2013
I have a Cisco 2801 with two DSL cards that are both routing to the internet, with NAT to the private LAN interface. I am using IP SLA and route maps to accomplish this load balancing. I have rsolved most of the issues that come with this setup, but I still have a major issue: I cannot SSH into both of the WAN addresses, only one. I have included whqat I think is the most relevant config info.
#sh run
! ........some info omitted........!
!
[Code].....
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Dec 6, 2012
I have on 7200 series router with NPE-G1 module which is facing high CPU utilization. I have not found any particular process causing this high CPU utilization as it is caused due to interrupts. I have already enabled fast switching by "ip cef" command. Please suggest how to normalize the utilization as it is impacting the network and causing slowness. Please find below the output of show process cpu and also find attached the show tech of the device. Also let me know if any other output is required.
[CODE]...
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Mar 2, 2009
latest OS release for this Model number: WS-C3524-XL-EN switch. I currently am running Version 12.0(5)WC17
The reason is, I'm having some issues installing some HP PC's connected to this switch. The nic card on the HP flaps up and down, disconnects/ reconnects continuously. The only way I get it to stop is to bring down the speed on NIC or the switch port to 10mbs.
If I add a nic card and disable the system board nic all is well.The HP rep says that Cisco has a patch for this unit. Any recent patch or what the latest OS is for this switch?
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Mar 18, 2013
I'm trying to have a standard equipment for our POP deployment. Basically this edge router will connect to our customers and pass data and or voice traffic, capable of BGP and good enough to accomodate up to 4 clients.
We have on hand a 3845 Router, and ME3600X. The 3845 is EOS and replacement is 3945. The ME3600X is a fixed configuration so would you recommend a 3945 or a much higher model like a 7300.
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Nov 14, 2011
We have a 1841 Cisco router for one of our remote sites and we have the GRE over IPSec tunnel on it (with our datacenter router) for the connectivity. The LAN facing interface becomes UP/Down (status 'UP', Protocol 'Down'). When I login the router and 'shut' and then 'no shut' the interface, the interface becomes UP and everything starts to work. Traffic starts to flow across it. But after some time, some hours or sometimes some days, the interface is again back to up/down status. The router is connected to a non-Cisco switch. I do see some CRC's increasing very slowly, but apart from that there seems nothing wrong with the interface in sho int fas0/0 command:
!
RTR01#sho int fas0/0
FastEthernet0/0 is up, line protocol is down
Hardware is Gt96k FE, address is 0026.cb91.ee48 (bia 0026.cb91.ee48)
[Code]....
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Apr 25, 2012
I have Cisco 7613 on my edge(MPLS Backbone). CPU utilization is shooting to 100% at frequent intervals. When I tell vendors managing device they tell that it is happening due to one of my server(connected on Fast ethernet port of 100Mbps) generating heavy traffic. My questions are:
1. Can a router of 720Gbps capability be choked due to traffic generated by 100Mbps link?
2. Interrupt CPU process utilization is well below 10% at the said time. BGP router process consumes most of the CPU. Does this means that server in question is generating too many routing updates?
3. Is there any way that I can limit routing updates on a particular link?
4. how to check which link is causing more CPU utilization.
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Mar 27, 2012
The modem checked out and was all good, the splitters are brand new and the line is apparently fine.This left the router as the issue. We had a Netgear router and attempted to replace it with a Linksys router.The firmware on both routers have been tested both old and new firmware.This happens to all computers/laptops connect to the network I do not receive a message stating that I was disconnected from the network, the internet simple cuts out for a little while and then comes back in.Cox says that they are 100% certain it is not on their end, nor is it the modem.The disconnects occur at random (there is no specific intervals). They last anywhere from 30 seconds to 10 minutes.
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Mar 10, 2013
I am just going to deploy some new 4900Ms for a customer. Want to know if configuring management for 4900 (everything like NTP, AAA, SNMP , DNS ) is doable through management interface in management VRF and there are no caveats to be aware of.
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Mar 11, 2013
I would like if is possible to stack a Cisco 4900M with a 2960S. I know it is not the most common situation but i need it.
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Apr 4, 2013
I have an issue with couple of Cisco 4900M switches. We just got them and tried to use the TwinGig Converter on the 4 ports 10G module.
The problem is that the switches sees the new module in slot 2 and when we are inserting the TwinGig Converters we are getting the error message and when we are trying to type the command this command it does not work."hw-module module <slot> port-group <group> select gigabitethernet",When we go to config T, the only thing we can type is "hw-module module <slot> and if we do a ? the only thing is available is logging and power and we can't type
Port-Group or anything else. Is this a hidden command or we have to something else?
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Jul 30, 2012
on a Cisco 4900M running IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-ENTSERVICESK9-M), Version 15.0(2)SG1, RELEASE SOFTWARE (fc4) I'm getting a lot of packets on CPU Q "L3 Glean, 6".What is that queue and what could be the root cause?
Packets Received by Packet Queue
Queue Total 5 sec avg 1 min avg 5 min avg 1 hour avg
---------------------- --------------- --------- --------- --------- ----------
Host Learning 1563 0 0 0 0
L2 Control 1138188 3 0 0 0
Ttl Expired 2 0 0 0 0
L3 Glean, 6 4889394 4067 4381 3367 779
[code]....
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Aug 10, 2012
Is it possible to use 1GB (SFP / Copper) on the built-in 8 x X2-10GB ports without any Network Module of 1/10GB. If so how.
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Jan 4, 2012
I have a client whom has a 4900M switch as their SAN switch. They are getting ready to upgrade their SAN to use 10G.I had quoted them a price for an X2 module, but I am unclear based on pictures I have seen of the part number
X2-10GB-SR
whether or not the X2 module plugs into the X2 slot on the switch, AND then also has to have a transceiver put in it to receive the SC ends of the Fiber jumper, or whether the SC ends of the fiber jumper plug into the X2 module directly.
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Mar 11, 2013
I would like to know if i can and how stack a Cisco 4900M with a 2960S. I know it's not the most common but i need it.
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May 7, 2012
I have this 4900M running version 12.2(54)SG1. I the log I get this 3 lines:
May 8 08:32:15: %C4K_SWITCHINGENGINEMAN-4-TCAMINTERRUPT: (Suppressed 429 times)flCam0 aPErr interrupt. errAddr: 0xC48 dPErr: 1 mPErr: 0 valid: 1
May 8 08:32:24: %C4K_L3HWFORWARDING-4-FLTCAMPARITYERROR: (Suppressed 866 times)FL Tcam Perr with no FwdEntry Hw index: 3144 Hw entry: Sw entry:
May 8 08:32:45: %C4K_SWITCHINGENGINEMAN-4-TCAMINTERRUPT: (Suppressed 432 times)flCam0 aPErr interrupt. errAddr: 0xC48 dPErr: 1 mPErr: 0 valid: 1
They seems to be coming on regular basis, repeating every minute. I've tried Google and the most relevant info I can find is this {URL}. But it says "Upgrade software to IOS version 12.2(52)SG or later OR 12.2(50)SG4 or later. ". I'm already running 12.2(54), so why does this 3 line repeatedly show up in the log every minute.
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Jan 1, 2013
First time user of cisco hardware and we just purchased the 4900m catalyst switch. My question is very general. I am simply hoping to network 3 servers together and I do not wish to do any fancy or advanced configuration. Can I simply use the web management interface for network administration and setup? I just downloaded the Catalyst 4500 Series Switch Cisco IOS software configuration guide and they talk about Cisco View network management system, is this my answer or is this what most people use for basic configuration and administration?
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Feb 12, 2013
I currently have IOS image cat4500e-entservices-mz.122-53.SG5.bin. According to my research it appears SPAN is supported on this OS. However, after looking at procedure notes using websites like here:
[url]... I cannot find and obviously not figure out how to use the SPAN command. My main objective is to simply setup a port mirror on one of my TenGigabitEthnet interfaces and from what I read SPAN is the best way to setup a tap interface on a cisco switch.
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Dec 8, 2011
I am just going to deploy some new 4900Ms for a customer. Want to know if configuring management for 4900 (everything like NTP, AAA, SNMP , DNS ) is doable through management interface in management VRF and there are no caveats to be aware of.
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Dec 18, 2012
We have to cisco WS-C4900M with Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-IPBASE-M), Version 12.2(53)SG5, RELEASE SOFTWARE (fc1).We have four gigabit link connected between those two switches.We have create a LACP port channel with those four ports on both switches. Ether-channel is up and running and defined with a load-balancing method of src-dst-ip.But when we test the load-balancing, it's not using the src-dst-ip rule with the XOR: [code]
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May 12, 2012
I have 4900M with X2-10G-LX4I need to have a link from it to 3560X GLC-SX-MM using MM Fiber Patch Cord.any configuration required in 4900M to change the speed of X2-10GB-LX4 to 1GB ?
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Feb 10, 2013
My current version IOS is cat4500e-ipbase-mz.122-53.SG5.bin. I just got a new version cat4500e-entservicesk9-mz.122-53.SG5.bin.I put the new version in bootflash: directory and tried various methods of starting the IOS up to run the new version but it always started in the original ipbase version. My start-config shows:
boot-start-marker
boot system flash bootflash:cat4500e-entservices9l-mz.122-53.SG5.bin
boot-end-marker
and I even deleted the ipbase version in the bootflash: directoy so then my switch would not even boot up at all and hung in rommon. In rommon I tried
boot bootflash:cat4500e-entservicesk9-mz.122-53.SG5.bin
and the result I got back was
File has bad file magic number: 0x0
So I had to point the switch to my tftp server and boot back into a back up copy of ipbase. how I can get my new IOS version to work? I understand I might have to download it again but I just got it so I am skeptical it is a bad file. [URL] as a procedure guide and I do notice some of those commands/steps do not work on my 4900m switch.
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Jan 6, 2013
I have been trying to get the http server enabled so I can access Cisco Network Assistant. I have my interfaces configured but for some reason the server in not running, port 80 is still closed. [code]
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Apr 13, 2010
I' ve three 4900M switches equipped with the WS-X4920-GB-RJ45 module and the WS-X4908-10GE module. Now I'm started to setup these switches in our lab environment for the first time. They behave a little bit strange in comparison with the C3750 series which I used before and which I will replace by these powerful machines.
I tried to setup these switches to be managed through the management port. I configured IP address, default route in the management vrf, set the source-interface for tftp,ssh,ftp and tacacs to use the management port. Ping using the manangement port was successful. After finishing theses steps I configured the TACACS and AAA settings accordingly the informations I found on CCO. I tested the settings with "test aaa group authentication" command- without success. On my Cisco ACS no request was received and the switch told me he could't reach the tacacs server. Other switches in the same IP subnet are working without failure, so firewall or server should not be the problem.
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May 3, 2012
I am little confused with all these SFP types.
Can I use GLC-LH-SM, GLC-LH-SMD and SFP-GE-L with Twingig converter module? When I used Cisco configuration tool, the only option is GLC-LH-SMD for 1000BASE-LX.
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Jan 17, 2010
I was wondering if a interface numbering scheme is available for the 4900M. Configuration includes 1 x 8Port 10G and 1 x 20Port 1G modules. would like to understand How the slots are addressedInterface AddressingTwinGig interface addressing
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Dec 10, 2012
know if Private Vlans are supported on the Cisco 4900m switch when set in VTP version 3 and VTP disabled?Most documents just specify VTY transparent mode without mentioning the version, trying not to assume since this is production.
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May 23, 2012
Got a question for 4900m with TwinGigi Converter. I bought couple TwinGigi Convert thinking to use it on fix module ports (8 * 10G ports on 4900m ten1/1 to 1/8). I follow TwinGigi configuration guide [URL]however, I am getting Invalid commands on hw-module:
Switch(config)#hw-module module 1 ?
logging Logging
Switch(config)#hw-module module 2 ?
logging Logging
power Enable/disable power to module in specified slot
[code]...
here is show ver and show mod:
Switch#show ver
Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-IPBASEK9-M), Vers
ion 15.0(2)SG2, RELEASE SOFTWARE (fc3)
Technical Support: [URL]
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Wed 07-Dec-11 20:20 by prod_rel_team
[code]...
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Feb 2, 2012
Would like to know if the Cisco Catalyst 4900M Switches are stackable?
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Jan 2, 2013
I am slowly working my way though the setup and configuration of our new 4900m switch. The switch will have a pretty basic operational configuration. We are simply going to network 3 servers together through the swtich. Anyhow, I have been fallowing the guide at this site: [URL]
Basically the switch is brand new and I just setup things such as the clock, the banner, and the hostname. Anyhow, at various points in the guide such as the configuration of the telnet password and especially the interface gigabitethernet I get the "invalid input detected at '^' marker". I also did a show interfaces and noticed there was not any gigabitethernet interfaces but there was a
"FastEthernet1 is down, line protocol is down Hardware is Fast Ethernet for out of band management, address i"
Anyhow, my thinking is continuing on with the guide and at least try to setup the interface for the management port so I can then use the cisco network assistant gui to then configure the rest of the switch.
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Apr 4, 2013
Do I need to run any special license (like IP SERVICES) on the Cisco Catalyst 4900M in order to run VRF lite?
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