Cisco Switching/Routing :: Command To Debug Packets On 3750 Switch

Apr 18, 2012

What other command can be used to debug packets on a 3750 switch ?

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Cisco Switching/Routing :: Debug Command Not Working On Nexus 5548?

Nov 15, 2012

My Nexus is a 5548-UP model, NX-OS version :  5.1(3)N2(1b)
I try to debug an OSPF and an ICMP problem using the debug ip ospf command and the debug icmp command but not output appear on the terminal. As the switch is remote, I entered the terminal monitor command of course.
SG01NX01# terminal monitor
SG01NX01# debug ip ospf 1 packets
SG01NX01# show debug


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Cisco Switching/Routing :: Copy Flash Tftp Command Failed On 3750 Switch

Oct 5, 2010

I have a cisco 3750 swicth which i want to load a new ios to but unfortunately there's no enough space on the flash. This means that i need to backup the cureent (old) ios to my tftp server but the command keeps failing. It always gives 'No such file or directory' error .The free space on the flash is 8mb and my new ios is about 11mb.I also went inside the directory where the old is and inputed the same copy command but to no avail.Below are some of the command failure on the swicth:

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Cisco Switching/Routing :: 3750 Switch - Eigrp Stub Static Redistributed Command Executable?

Feb 29, 2012

On 3750 switch with IOS c3750-ipbasek9-mz.122-55.SE4.bin  "eigrp stub static redistributed" command will be executable ?

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Cisco Switching/Routing :: How To Debug A TCAM Switch On 877W

Feb 24, 2012

I've created a BVI2 where I bridged dot11 0.2 and vlan2 in order to have wired and wireless clients in the same vlan.Some wired client are not reachable from the lan. Wireless clients have no pbl in reaching each other.Monitoring a MAC address that is supposed to be behind the FA2 I have noticed that it moves to vlan2 when in fact it should be behind the FA2.Of course when "show mac-address-table" says it is behind Fa2 the ping to that MAC address works whereas when the TCAM reports it is behind vlan2 it doesn't. Once the MAC address is behind the vlan2 if I clear the mac-address-table and that mac-address is still put behinf Fa2 then the pings works again, sometime I have to perform twice the clear command before the MAC address goes back to the right location.I'd like to understand why the router moves that MAC address from Fa2 to vlan2 and that's the reason for my question in the subject.I don't have any problems for port Fa0 and Fa1."Show int fa2" doesn't show any problem/errors or the likes.BTW even if I force that MAC address to be statically behind FA2 the ping works fine but then stops and if I do "show mac-add" the static entry for it is still there... so looks like there us something that overrides that static entry. If clear everything and I have the mac-address be behind Fa2 then everything starts to work again. I used Fa3 instead of Fa2 and I get the same results.
IOS: c870-advipservicesk9-mz.151-3.T1.bin

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Cisco Switching/Routing :: 5884A9C - Getting Debug Message On Switch

Sep 3, 2012

I have a message that appears when i run a debug on my switch :
Core1#pak 5884A9C consumed in input feature , packet consumed, MCI Check(63), rtype 0, forus FALSE, sendself FALSE, mtu 0, fwdchk FALSE

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Cisco Switching/Routing :: 3750E Debug Causes Switch To Crash And Reload

May 3, 2013

I am not able to find the exact bug for Cisco 3750E stack - Debug Exception (Could be NULL pointer dereference) Exception (0x2000) error. Closest i can find is CSCsa72400 which only affects ver 12.2(20)SE4.All the stacks (3 switches) are running 12.2(50)SE3, It appears that the switch 1 crashed and reloaded. My hunch is its software but i cant find any related bugs. It could be hardware issue as well ?

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Cisco Switching/Routing :: When Use Dot1q-tunnel On 3750 / Packets Seems To Be Corrupted

Nov 20, 2011

In fact i receive traffic on a one client per vlan basis (traffic is PPPoE), i receive all this traffic on a router, collecting all these vlan on a bridge where the pppoe packets are treated.When I use a transeiver to convert operator fiber arrival to my router copper media interface, i have no problem....
When I use dot1q-tunnel to make the same on my 3750, packets seems to be corrupted.I get PPPoE timeouts and packet loss, not regulary, totally stochastic...
I made dozen of tests and different settings, without success I first thougt of MTU issues. [code] I made tests with system MTU and/or system jumbo MTU above 1500, without success.I didn't found any known caveats on 3750 running Version 12.2(25r)SEE4 related to dot1q-tunnel.

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Cisco Switching/Routing :: 3750 Receiving CDP Packets From Switches Not Directly Connected

Jun 27, 2010

A specific switch port which happens to be part of a 2 switch 3750 Switch Stack is seeing multiple CDP packets from 3 extra switch port interfaces that are not directly connected. Noteworthy is that the far end devices have the correct CDP entries and I physically confirmed at least two of those connections that lead to the switch "upstream to the culprit switch". Tricky part is that its production so room for maneuvering is limited. At some point I disabled all Ports save for the real uplink and the problem momentarily disappeared. Re-enable the interfaces problem resurfaces. Is there an explanation, technique to eliminate the culprit with minimal disruption?

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Cisco Switching/Routing :: What Is The Use Of No Switch Port Command In L3 Switch

Dec 28, 2008

what is the use of no switch port command in L3 switch?

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Cisco Switching/Routing :: IP Flow Command On 3750-X?

Nov 12, 2012

Trying to configure netflow on a 3750-X. I'm sort of copying my config from a router but, it seemd that the commandes below don't work.
Is there different set of commands to configure the source and destination.
ip flow-export source Tunnel0
ip flow-export destination 172.20.X.X 9995

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Cisco Switching/Routing :: 3750 - Explanation Of Command

Feb 18, 2013

Could some one explain what the command . ip route . will result in?

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Cisco Switching/Routing :: 3750 / IP Routing Command Not Existent

Feb 27, 2013

I have just bought two Cisco 3750 and stacked them. When in global config mode, The IP Routing Command does not exisit.

See Version below
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(55)SE3, RELEASE SOFTWARE (fc1)
Technical Support: [URL]
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Thu 05-May-11 15:40 by prod_rel_team
Image text-base: 0x00003000, data-base: 0x02800000

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Cisco Switching/Routing :: Forwarding IEEE 802.3 Raw Packets Through 2960G Switch

Dec 5, 2011

I have a requirement to monitor downstream data feed from a remote site and feed it to multiple destination devices for recording.  The source data will be fed into a port on a Cisco 2960G switch then, using the monitor function, be forwarded to multiple interfaces.   This works fine for normal Etherent II traffic.  We tried a test using a device that generates IEEE 802.3 Raw packets ('type' field is used as a 'length' field) but found that while the traffic appeared to be accepted by the input port with no errors it was not forwarded to the destination ports, even when using the monitor function.  I did try the 'encapsulation replicate' feature with no luck.  It does not forward these packets even if I set all the ports into a common VLAN and let the switch just perform a normal switch function (non monitor).
if it is possible to get the IEEE 802.3 raw packets to pass through the switch and if it is, how to or what I need to do to make it work?

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Cisco Switching/Routing :: Catalyst 3560 Switch Won't Forward Packets To Or From MAC Address

Aug 9, 2012

I have some Ethernet-connected cameras that all have the same Ethernet MAC address FF:FF:FF:0A:0A:0A. They were originally designed to directly connect to a Windows PC, but they can also connect through a simple unmanaged switch.A Catalyst 3560 switch won't forward packets to or from anything with that MAC address, at least not by default. Is there a way to convince the switch to do so?
It was my hope to replace the dedicated connections we have for these cameras with a separate VLAN for each camera, and switch them through our existing switch network. Given that all of the cameras use the same MAC address, putting them on the same network is out of the question, but different VLANs, where the only two devices on each VLAN were the camera and the PC that uses it, would be fine.
The switches run IOS 12.2(55) SE through SE3. I learned the camera MAC address from the PC's ARP table while the camera software runs; it turns out the cameras don't have a full IP stack either and don't even do ICMP.

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Cisco Switching/Routing :: Cat 3560 No Switchport Command Test Out Routing With Switch

Dec 8, 2011

The last few days I've been exploring options in getting rid of some old routers accross a wan connections.  I have a cat 3560 to play with and I thought I would try and use the no switchport command test out routing with switch.  I've got some type of route issue and I tried a few things which I thought would fix the issue but had no effect.  I'll post the config and a few commands so you can see what the basic setup is. 

Here we can see in the arp that it knows about both (PC unable to ping as well as (ASA).I tried adding in a ip route of as well as  Neither produced the results I wanted allowing (PC) to ping the ASA ( [code]

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Cisco Switching/Routing :: 3750 / 3800 - Configure Trunk Between Switch And Extreme Switch

Nov 2, 2011

i have an issue to connect a trunk between cisco switch and extreme switch i have many vlans that i want to cross via a link between cisco 3750 switch and a Extreme Alpine 3800 switch

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Cisco Switching/Routing :: 3750-X Stacking Switch By Switch

Nov 18, 2012

I have two 3750-X configured to be a stack and I am planning to re-rack these somewhere else.  What I would like to know is what are the effects of having the master switch itself lose power?  Does it immediately just make the member take over master (there should be no election since there are only 2 switches??) and there would be no loss of connectivity?

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Cisco Switching/Routing :: X4648-rj45V+E Module Not Forwarding Frames / Packets In 4507E Switch?

Mar 26, 2012

I have a problem with x4648-rj45V+E module, which is not forwarding frames/packets in my 4507E switch. I have done the diagnostic and the module test is passed. When i try to ping from one PC to another in the flat network, icmp is not forwarding. Even i cannot see the mac addresses in the mac address-table. But i can ping to my management port in the sup module?

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Cisco Switching/Routing :: 6506E Switch Command Meaning

Feb 5, 2012

I see the command "vlan access-log ratelimit 2000" and wonder what it is that it does.

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Cisco Switching/Routing :: Route-map Command Support On Switch 3550?

Sep 30, 2012

I have cisco switch 3550 IOS Version 12.1(19)EA1c.   
I can configure route-map commands on that.  but i can not apply that into any vlan interface.   while i try to apply the following command ( ip policy route-map PBR) on VLAN int i get an error msg saying that the command is not recognized.

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Cisco Switching/Routing :: 7018 Is VPC Peer-switch Command Intrusive

Apr 3, 2012

I need to enable vPC "peer-switch" command on a pair of Nexus 7018s which are currently vPC peers (primary and secondary). The STP root and Secondary root are currently configured  across these switches.Can I enable the peer-switch command in this configuration without impacting services, and then modify both switches to have the same bridge priority without impacting services ? We have a few downstream 5ks which are not dual homed to both vPC peers (work in progress) so need to understand if the peer-switch command will in any way break this connectivity for now.

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Cisco Switching/Routing :: Switch 3550 - Command To Display GBIC In It?

Nov 9, 2011

Is there any command to display the GBIC in the switch because I need to replace 3550 but I have no exact part number

the model is WS-C3550-24-SMI
and try
sh inventory
sh hardware
sh diag
sh module

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Cisco Switching/Routing :: Command To Verify MDIX On 2960S Switch?

May 9, 2012

I config mdix on port gi1/0/7 as mdix auto IT does not show in running config.Is there any way or command which i can use to verify mdix on port?

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Cisco :: C892 / Overload Router With Debug Command

Jan 10, 2012

I use a C892 router with the IOS c890-universalk9-mz.152-1.T.bin. I just ran the command "debug ip packet 151 detail" and then the router stopped to work because it was overloaded. The ACL151 I used is as follow:
Extended IP access list 151
10 permit ip host host
 In the syslog then I got hundred of messages from IPSec:
Jan 11 09:43:35.677:  IP: s=, d=, pak 8A7453CC consumed in output feature , packet consumed, IPSec: to crypto engine(70), rtype 1, forus FALSE, sendself FALSE, mtu 0, fwdchk FALSE

For me it seems just like that this ACL is not applied and that I have a debug then for the whole traffic.

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Cisco Switching/Routing :: (no Shutdown) Command Is Not Working In 2970 Switch Port

Apr 9, 2013

a switch port is shutdown, but when i use NO SHUTDOWN command it is working and shows administratively down. like this command does not affect on it. i should enable this port? what can i do btw, port is not in errdisable and portfast is enabled.

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Cisco :: Terminal Monitor Command Not Showing Debug Output?

Feb 22, 2011

What would cause debug output to not show on a remote session via telnet connection where you've enabled terminal monitor?

The reason I ask is I was working with a client and we were debugging WCCP. I ran the debug ip wccp packets and events commands, then entered terminal monitor. After this, we saw nothing. We should have at least seen particular WCCP-related packets because we saw the necessary cluster view was established which can't be done without the exchange of these packets.

Can having syslog (logging) configured cause the issue? Did I use the command incorrectly?

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Cisco Firewall :: ASA5585 - Debug Command Stops After Exiting

Oct 19, 2011

We are experiencing intermittent issues with the IPS on our ASA5585 vs 8.4(2). Probably something with the dataplane. So I want to keep debug cplane 255 activated and logged with log debug-trace setting to syslog server. But when session times out the debug command is cleared so the output stops. Since it is a intermittent issue I want to keep debug activated...Totally different behaviour then with routers which keeps it activated. how to keep debug activated on a ASA.

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Cisco Switching/Routing :: 3560G 15.0(2)SE - Show Platform Forward Command Crashes Switch?

Dec 5, 2012

I have been working on some Catalyst 3750's running 12.2(55)SE6 and hit an issue with CEF load-balancing over multiple equal-cost paths.  Anyway this issue is now solved but it introduced me to the command 'show platform forward' - this shows you how the forwarding of a packet would be done via hardware cef (as opposed to the command 'sho ip cef exact-route' command that only shows the software cef path).  Anyway I tried the command on a 3560G running 15.0(2)SE and it crashes the switch.  I tried it a couple of times and verified that the MAC & IP addresses were exactly right in the command and each time the switch crashes. I have extracted the relevant bits from the crashinfo and attached them. 

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Cisco Switching/Routing :: 6509 Core Switch Command / IP PIM Sparse-dense-mode

Oct 23, 2011

What is PIM? give me an example when I will use and not use the PIM command.

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Cisco WAN :: Command To View What Type Of SFP Module Installed In Catalyst 3750 Switch?

Jan 20, 2013

Is there a command that can be used  to view what type of SFP module that is installed in Catalyst 3750 switch?

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Cisco Switching/Routing :: WS-C6513 Command To Check 6500 Switch Performance / Resource Usage

Apr 25, 2013

I am on a call right now troubleshooting some latency issue. The CPU usage on the sup card is low. Don't see any drops or input errors. I am aware that the switch and its modules have capability limits. Is there command I can run which will tell me if any module is overloaded or if the fabric/backplane is over utilized?My chassis is WS-C6513 and sup card is WS-SUP720-3B.

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Cisco Switching/Routing :: Switch Port Auto-state Exclude Command Not Working In 4500

Jun 3, 2013

I have configured a SVI in my 4500 ( Sup 7-E 10GE,,,,,,and,,,,,cat4500e-universalk9.SPA.03.02.00.SG.150-2.SG.bin) switch and it is showing Down Down, because there were no active switch port in the vlan, I added one switch port to this vlan but this port also in the down state, so i added the SWITCH PORT AUTO STATE EXCLUDE command under this port, even after this also the SVI never came up, So i added one systen to the port so both the switch port and the SVI came up...So why SWITCH PORT AUTO STATE EXCLUDE command have no effect in this model of the switch..

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