Cisco Switching/Routing :: Port Down (Link Failure) On FEX (2232TM)
Jan 8, 2013
We have FEX (2232TM) connected with 2 x NEXUS N5K-C5596UP.
One port Ethernet 101/1/7 which was connected to Dell Server went down...
It was working for a couple of weeks at least. Then the link went down and now I'm unable to get anything connected to this port As I said, this already happened before, but unfortunately I can't remember if it was on the same port/fex ... from the fex uptime it seems that this was on another fex I was able to get the link back up by doing a power cycle of the fex
At the moment Dell server is connected to different port Ethernet101/1/4.. See config bellow:
. config, how ports are configured
interface Ethernet101/1/7
description VM008 Network 1
switchport mode trunk
[Code].....
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Feb 2, 2012
We recently purchased a pair of 2232TM Fabric eXtenders just to find out that our Nexus 7000 does not support it. Will there be support for the 2232TM FeX in Nexus 7000 any time soon?
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Oct 11, 2012
Need clarification on the VPC with 5k and 2248 Fabric Extenders. My question is can each fabric extender uplink to two different 5ks, and at the same time, have servers connected to two both fabric extenders with a VPC.So basically, the server NIC will team with two different fabric extenders, and each fabric extender will connect to two different 5k's.
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Jul 9, 2012
I've Nexus 7010 switch installed in my DC. I've conncected Cisco router to one of the Ports. On the same port I'm getting following error message and hence, unable to form EIGRP neighborship.
DR-CORE-SW-S01-NEXUS7K %MODULE-2-MOD_SOMEPORTS_FAILED:
Module 1 (serial: JAF*******NGK) reported failure on ports 1/2-1/2 (Ethernet) due
to R2D2 : Speed patch failed - no frames transmitted in device 143 (error 0xc8f0
1273)
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Jan 27, 2013
I have implemented in my company network recommended by cisco scheme with MEC etherchannel from some segment distribution layer (VSS) to core switches (legacy 650x) exactly as on picture: Core switches have rather old IOS (Version 12.2(33)SRB4 and i have reasons not to upgrade it now) which dont support many functions - like BFD over Etherchannels and Enhanced PAgP. And we run a OSPF/MP-BGP/MPLS bunch over those links with OSPF reference bandwidth configured to such values that failure of one link in etherchannel will not lead to link cost changes (we dont have a lot of traffic for now on those links and 1 link can handle it easily) and consequently will not trigger changes to RIB and BGP topology table.
Problem is that i am afraid that in case of one of link of portchannel will fail (but without port down event - unidirectional link or smth else) it will take rather long time to converge - and im talking about L2, not L3 protocols. Cos i cant implement BFD and ePaGP over this link - best i can do that improve 30 seconds PAgP hello timer to 1 second. But at least 3 seconds of possible traffic blackholed - is rather big problem.First time i considered 2 possible solutions:
1) BFD - but even i can use it, it will not improve much recovery time cos 750 ms for BFD over etherchannel not much better that 1 second PaGP fast timer.
2) ePAgP - as i understand this protocol have enhancements to discover failed link faster and improve recovery time, but all information i can find about it - is how to use it for dual active detection and none about timers improvements. So i cant be sure that i should upgrade IOS on Core switches and it will improve my failure detection time. ( if it possible adduce some links to description of this protocol enhancements in comparison with PAGP)
For now im already thinking about using four L3 links (instead of 2 portchannels) and BFD over those links with 50 ms hello timer. But in case of link failure reconvergence of OSPF will take some time, and BGP will react to this no immediately, so i am afraid that even using aggressive timers for routing processes and hellos i will not win much time.
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Feb 27, 2013
I am building a new network and intended on using the min-link feature on my port-channels between a 3750-X series switch and Nexus 4k.
However reading further into this it seems this feature is only supported on higher end models. I cannot find any reference to the min-links feature in the 3750-X configuration guide. Is this an available feature?
The 3750-X model is WS-C3750X-24T-L running IOS 12.2(55)SE3 IP Services
My thoughts is that the is only an LACP supported feature so I may not see the command until I have entered an LACP specific command on the port-channel but unfortunately I do not have a 3750X to verify this on at present.
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May 17, 2012
I configured the interfaces individually at L3 and could ping across each link Example:
4500 Switch 2: 6500 Switch 1
int t5/1 - int g3/17 1 Gig fiber link
tore down config
tried second set of interface
int t6/1 - int g8/17 1 Gig fiber link
Ping successful
[code]....
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Nov 8, 2011
We have a couple of IBM blade chassis with Nexus 4000I 10G blade switch in it. Four 10G ports from each Nexus 4000I switch are bundled into a port channel and connected to Nexus 7K. On the 4k end, one port in the port channel is doing down and coming up as an idividual port. After few minutes it is going down again and coming up as a port-channel member port. It is happening quite offen. [code]
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Apr 3, 2012
I have one 12-port 3750 switch having one gig connectivity with ASR-9010 router having IOS-XR. I am not able to ping this link with 9000 mtu size. I have enable system mtu jumbo on switch to 9000 and on ASR router interface mtu is set to 9114. At switch side switch interface is configured as a trunk port and one vlan has been passed on that interface. I am not able to ping the ip 172.16.10.2 with 9000 mtu size.
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Nov 4, 2011
I am trying to update a switch I bought to the latest IOS using the Cisco Network Assistant but the it is failing becasue it's saying I dont have the space.
In the CLI I get,
Switch#dir all-filesystemsDirectory of flash:/
2 -rwx 109 Mar 01 1993 00:01:47 +00:00 info 3 -rwx 270 Jan 01 1970 00:01:37 +00:00 env_vars 7 -rwx 3081999 Mar 01 1993 00:03:23 +00:00 c2950-
[Code]....
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Feb 2, 2012
After trying to downgrade a Nexus 7K from 5.2.1 to 5.1.5 by updating the boot & kickstart boot statements and reloading, I'm now stuck in an endless cycle of reloading. See below:
Is there a break sequence which will allow me to modify the boot statement back to the original via ROMMON or something similar?
[code]....
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Mar 11, 2013
I have a cable from an SFP module in a WS-C3750-48P with 12.2(55)SE1 running to a Gigabit port on a Cisco WLC. After the switch recovers from a power failure, the gigabit autonegotiation fails. The cure is a long drive to unplug and reseat the SFP. Note this happens at too many similar sites for this to be a loose connection. Interface shutdown then 'no shutdown' is not sufficient. The state is 'line protocol is down (not connected)'. Interface is configured for switchport mode trunk (auto speed, auto duplex). Command 'switchport nonegotiate' makes no difference. Is there a more powerful command than 'shutdown' which might toggle the interface signals? Is there some way of resetting the SFP? sh int gi 1/0/1 displays 'media type is 10/100/1000BaseTX SFP' and zero packets received.
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Apr 23, 2013
I have a C2960-24TT-L Switch with the following problem:When the Power Cord is plugged in the Switch, all switch indicator LEDs go on very briefly. Then SYST LED blinks very briefly, goes on steady and remains at this state without any indication at the console.Tried the reset by holding the MODE button while plugging in power but I still get no indication at the console. All is fine with console, meaning that if I take out the cable and plug it in another switch, then I see all that there is there to be seen.My question: Is the switch beyond repair or is there something that can be done to get the switch to run POST and boot at rommon so that I can reload SW and configs?
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Apr 11, 2012
I'm currently getting a Nexus hardware failure at present.
switch %MODULE-2-MOD_DIAG_FAIL: Module 8 reported failure due to DEVICE POST/DIAG FAILURE in device 48
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Jan 24, 2013
IOS upgrade tried on the stack of 2XWS-C3750X-24T-S , Upgrade was tried to support WCCP on the platform. Current version is Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(58)SE1, Not able find any IP Plus ios in the site ? Only available are IP base and Universal K9 , Tried upgrading to c3750e-universalk9-tar.122-58.SE2.tar by using stack upgrade method as per document [URL]
Upgrade fails with error :
%Error opening flash:update/info (No such file or directory)
ERROR: Image is not a valid IOS image archive.
Why current ios is not supporting WCCP , I hope it is there in the featureset. ( tried "sdm prefer routing" but no success) Does c3750e-universalk9-tar.122-58.SE2.tar will give me wccp support ? What is the issue with my upgrade and how do I do a successfull upgrade ?
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Sep 16, 2008
When installing the license for a 3750-E I get an error that the license doesn't reside on the flash though dir reveals the image in flash. Seen this, know of a resolution?
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Nov 28, 2012
We had power failure catalyst 6509 and after the device boot up ssh does not work any more below is error messages
line con 0
access-class 90 out
logging synchronous
[Code]....
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Apr 18, 2012
We have a stack of a 3750E with a 3750X, when we turn off the master, a disconnection occurs for around one minute while only one request timeout is seen when the slave is turned off. Is this normal? Details: in other words, when the slave switch is elected as the new master all the port-channels and some physical ports become in 'down' state before reobtaining the up state again, this results in a one minute outage. The question is: is it normal to have a layer2 control traffic interruption when the master fails and re-election occurs and if yes, what is the normal downtime in seconds. the layer2 control information such as port-channels LACP protocol are not synchronised to all slave switches by the master?
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Nov 5, 2011
applied an iOS update to a stack via tftp. I used the archive Download-sw tftp:// method. I rebooted the stack after complete and it never came back up. I discovered the master switch upgraded but not the member. The member was sitting there with all amber lights on and frozen after the iOS load. The master wouldn't finish boot until I removed the member from the stack. I had a version mismatch and they would not communicate.
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Jan 3, 2013
I recently tried to manually format the flash on a model WS-2960S-48TS-L switch running IOS version 15.0(2)SE. While executing the operation I got the following error - mifs[8]: Failed to create superblock %Error formatting flash (I/O error).As a result the flash is no longer accessible by the switch. I spoke with Cisco and they indicated that a switch reload would remount the flash and make it accessable again but the .bin file would need to be reloaded using the xModem recovery procedure (what a pain).The next IOS version 15.0(2)SE1 will supposedly fix this bug but it has not been released yet. In the meantime if you are running 15.0(2)SE you may want to hold off performing a "format flash:" function on a 2960S.
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Jul 7, 2012
One of my customer had a problem with A/C and the room temperature reached almost 50 C. We came to the site and saved the configuration, took a backup and shutdown the switch.
After the A/C problem is resolved, we tried to power-on the switch .. and we found that it is going to the rommon.
I put "boot" command to boot from the bootdisk, but I am getting the following error:
Code...
I tried to search it, But it is resulting in that most probably it is a hardware failure on the SUP.
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May 26, 2013
I have a cisco 876 with, c870-adventerprisek9-mz.124-6.T9.bin. I have configured a VLAN with ID 230, an SVI with IP 192.168.230.1/24 and I have assigned switch port fa 2 to it…
interface Vlan230
ip address 192.168.230.1 255.255.255.0
VLAN ISL Id: 230
[Code]......
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Dec 20, 2012
7x stack WS-C3750E-48TD-E orignal code 12.2.35...i wanted to get it to 15.0.1 so as a test i disconnected top switch (not the master ) and installed via archive download-sw /allow upgrade 15.0.1.tar. and it worked away fine...
so i moved onto the stack, issued the same command, image loaded rebooted and stack hung..Consoled in and switch was unable to boot..looping on trying to load flash. [code]
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Dec 7, 2011
I want to capture RPS related alarm on SNMP server for RPS2300 and cisco 3750d switch
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Jul 22, 2012
I have a switch 3560v2 with an IOS 12.2(50) SE1.All the lights ON and console error message below:POST: inline power post failed for port 0 up to port 15.Then, the system hanged and all lights (indicator) ON.
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Aug 15, 2012
We recently installed a WS-X6716-10GE module in slot 6 within a Cisco 6506. We are using two ports on the module (6/13 and 6/14), which are port channeled together to a Nexus 5548. Everything has been running fine for about a month and the card had a green light but the ports stopped communicating. The module was screwed into the chassis/slot. For problem determination reasons, we reconfigured ports 6/13 & 6/14 to 6/15 & 6/16 and moved the cables but the module was still not responding. We eventually pulled the module out of the slot and reinserted the module back into the slot, which reset the module and fixed the problem. Is there any way to determine if this was hardware problem with the module and it should be replaced, or is it a software bug/problem? We opened up a ticket with the TAC but we haven't heard back from them yet.
Cisco WS-C6506-E
Cisco IOS Software, s72033_rp Software (s72033_rp-IPSERVICESK9-M), Version 12.2(33)SXI8, RELEASE SOFTWARE (fc2)
Mod Ports Card Type Model
--- ----- -------------------------------------- ------------------
5 2 Supervisor Engine 720 (Active) WS-SUP720-3B
6 16 CEF720 16 port 10GE WS-X6716-10GE
[code]....
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May 14, 2008
The Catalyst 3750 switch reboots, and the " Reloading because of stack merge or communication failure" error message appears.
I saw this issue at "Cisco wiki" but the resolution in that page is just "Open a case with TAC". Because of the reasion is H/W Problem.
Is The resolution only one ? anything else? The 3750 does not use Stack.It is just stand alone. So i think it has other resolution as "disabling Stack" or another one. How about my opinion ? Is the Resolution only "Open a Case with TAC"
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May 29, 2013
I have a stack of 3750x switches running 15.0 (2) SE2 IOS. When I reload the switch stack, I am seeing the following message in the logs: IPv6 user port trust TCAM write failed.
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May 15, 2013
setting up VRF-lite on redundant 6509-E chassis to account for chassis failure? Let's say I have 2x 6509-Es configured with HSRP for 2 vlans, ServerA and ServerB. So
6509-A#
!
interface Vlan10
description ServerA VLAN
ip address 10.10.10.2 255.255.255.0
ip flow ingress
standby 1 ip 10.10.10.1
standby 1 priority 105
[code].....
I now need to create an environment where the Server VLANs can be provided for two customers and they need to be wholly separate. On 6509-A, I make VRF CustomerA and VRF CustomerB and I assign Vlan10 to VRF CustomerA and Vlan20 to CustomerB. Do I create the SAME VRFs on 6509-B with the same logic?
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Feb 8, 2012
I have two WS-X6148-45AF linecards here that have been out of use for quite some time. Upon inserting them in one of our 6509-E's I noticed that both had "Minor Error"s on their module diagnostics.
I would have just assumed that the cards were dead and requested replacements, but both cards have the *exact* same diagnostic errors, which only seem to effect every-other port. That's too much of a coincidence for me, so I figured I'd ask on the forums and see if I'm just missing something obvious before I assume the worst. Are these cards both somehow damaged in the exact same way? Or is there some config/compatibility issue that I haven't heard of?
relevant diagnostic output from one of the cards (Both outputs the same, no use posting twice) is below:
Router#show diagnostic result module 4
Current bootup diagnostic level: minimal
Module 4: 48-port 10/100 mb RJ45 SerialNo : SAL11391VUY
[Code].....
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May 8, 2012
On the supervisor card of a cisco 6500 series, according to the following link, [URL] it only has 2 uplink ports on the card. Would I be correct in assuming that I only have those to ports that I can configure IP addresses on?
The cisco that is being devlivere is coming with a 48 port switch and 24 port fibre switch. Could I change any of those ports into a router port and configure IP addresses on those?
The supervisor card is a ws-sup-720-3b the 48 port switch is a ws-x6748-ge-tx the 24 port fibre switch is ws-x6724-sfp
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Aug 13, 2012
I'm trying to enable port security on several 4507R's. When I try to configure a range of ports the switch will randomly put 1 or 2 in err-disable. It's different every time I apply the config to the same group of ports. However if I do them one at a time it seems to work. But I really don't want to configure 6 fully populated switches one port at a time. We also have a lot of 3750's and they gave me no problem using a port range. [code]
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Jan 15, 2013
We just installed a hosted VOIP system using Cisco 7900 series IP phones. We are having a strange issue with a few computers where they pull DHCP information from our VOIP provider's DHCP server on the Internet and not our LAN DHCP server.
The switchports areconfigured as: switchport mode access
My rationale behind this is that the phones would use CDP to get their VLAN info from the providers Cisco router and the PCs would just ride on the default VLAN. But this is not the case. Computers randomly keep getting DHCP info from the provider's router. Do I have to use voice vlan x and make the switchports trunks?
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