Cisco 4506 switch in Err-disable mode

I have a Cisco 4506 switch and its 10 gig interface is in error disable mode.I tried Shut and no shut the port couple of times but it transits from up to down number of times and then to error-disable. Did anyone else encountered this issue before. kindly advise the solution for the same. thanks

Hi Shariq,
Can you post the output of the show interface status err-disable ? That output contains the reason for putting your port into err-disabled state.
Best regards,
Peter

Similar Messages

SF300-24PP switch causing err-disable on some other switch Uplinks

This is something that happened as I was setting up a couple of these PoE SF300 switches for IP cameras.
We wanted to save a little money so we purchased a few of these switches to daisy-chain onto a couple of our 4507s to provide PoE support for IP cameras that are coming in. But an odd thing happened when I set one up and connected it.
I set up the SF300 switch with all FE ports set to access and for VLAN 18 (our camera VLAN). I then configured a Portchannel (PO2) and assigned GE1 and GE2 to it. I defined the allowed VLANs 10,14,18 on the Port Channel Interface definition. I also created an SVI Interface VLAN definition for our management address (on VLAN 10) to be able to SSH into the switch once it's on the network.
I did most of this thru the CLI and not the GUI.
I saved the config (copy run start) and turned off the switch then deployed it in the IDF closet. I powered it up and connected the GE1&2 ports to 2 Gig ports in the 4507 defined with PO2 - both with MODE=ON.
Well, as I found out later, my config changes never got saved and the GE1&2 because trunk ports, so when I plugged them in, They started acting independently. At about the same time another switch we have in our network (that is daisy-chained off a 3750 - 1 trunk port) suddenly had it's uplink put into ERR_DISABLE mode (we also had this occur with another 2 switches with a very similar config - Daisy-Chain).
Now , how my config never got saved issue, is not at the forefront of my mind as much as how did a couple of switch uplinks in another building go into ERR-DISABLE.
I know that our 4507s run rapid per-vlan STP+ and that the SP300 only runs Rapid STP, but this is a real mystery to us. If anyone has any ideas for tracking this down, please reply.

Hello James,
Welcome to the forums!
About the default settings. The switch comes with vlan1 as the default vlan for all traffic.
Here is a quick overview of the port settings
access - one vlan
trunk - multiple vlans
general - multiple vlans (had additional options)
When using the auto voice-vlan, you can have your port set as access for vlan 1 and when the switch see a phone connected, it will join the voice vlan also. This allow the ports to be dynamic. It is not necessary to do this. You can create all ports as trunk ports that are part of both your default vlan and your voice vlan.
The benifits of auto-voice vlan
-phones are discovered and joined to the vlan dynamically
-predetermined QoS settings
-security in that you can have your port set to access
This is a relatively basic overview.
As for the problem you are seeing. I would recommend that you check the firmware of the switch and upgrade if needed. While it may not have anything to do with the problem at hand, it will help prevent any future issues.
I would suggest disabling the Green Ethernet, which can be found under the port management section. If you continue to see the problem after that, I would recommend giving us a call at the support center. We will be able to look a little closer to what is happening.
http://www.cisco.com/en/US/support/tsd_cisco_small_business_support_center_contacts.html

Cisco 4506 Switch Hanging

I have got a 4506 switch with Sup V 10GE. This switch is in VTP domain, but in VTP transparent mode. I has got hanged twice, could anybody tell me the reason what could have happend.
There was no configuration change been done to that switch.

Hi Suresh,
CSCsb61172 can be confirmed by looking at the output of "show platform hardware interface all".
eg:
CAT4510#show platform hardware interface all
Global Hardware Gigaport State
RxIpg : 6
TxIpg : 264
FreeListCount : 329 <<<-----
Note that typical values of the free list count are between 20,000 and 64,000 depending on the traffic
being switched. A count of 329 above is too low and indicates a memory leak.
So if you see the number decreasing constantly, then you are running into this issue. The fix is in 12.2(25)EWA5, 12.2(31)SG, and higher.
HTH,
Bobby
*Please rate helpful posts.

WS-C6509-V-E VSS Pair: Random ports going into err-disabled due to udld error

We recently (a few months ago) put two 6509s into VSS mode and had many teething problems. One of the problems we had was random ports on switch 2 of the pair came up in err-disabled mode after a reboot. We somehow fixed them by combinations of shut/no shut, reseating or changing SFPs, etc.
Two days ago we saw half of the ports on one card were in err-disabled mode due to udld errors. We cannot find a way to bring them back up (tried udld resets, etc) and think it's really strange that it's a block of ports on the same card. Also it's strange since last time we had this problem it was on different cards (switch 2 as well though).
See below Te2/3/5-12 are in err-disabled mode. All other ports are fine. We highly doubt a physical problem with fibre and SFPs. Initially suspected the line card, but happened on different cards last time.
Is there some bug anyone is aware of? Software or physical issue?
Thanks in advance,
Paolo.
Hardware: WS-C6509-V-E
Version 15.1(2)SY3
XD#sh mod
Mod Ports Card Type Model Serial No.
1 20 DCEF2T 4 port 40GE / 16 port 10GE WS-X6904-40G SAL1737CMC3
2 20 DCEF2T 4 port 40GE / 16 port 10GE WS-X6904-40G SAL1737CMCH
3 20 DCEF2T 4 port 40GE / 16 port 10GE WS-X6904-40G SAL1737CMCQ
4 20 DCEF2T 4 port 40GE / 16 port 10GE WS-X6904-40G SAL1739D8NA
5 5 Supervisor Engine 2T 10GE w/ CTS (Acti VS-SUP2T-10G SAL1737CU10
6 5 Supervisor Engine 2T 10GE w/ CTS (CSSO VS-SUP2T-10G SAL1737CU0L
7 20 DCEF2T 4 port 40GE / 16 port 10GE WS-X6904-40G SAL1739D8PF
8 20 DCEF2T 4 port 40GE / 16 port 10GE WS-X6904-40G SAL1739D8R2
9 48 CEF720 48 port 1000mb SFP WS-X6848-SFP SAL1746GBR7
XD#sh int status | i Te2/3
Te2/3/5 Mmbr HS-10G-XA-1 err-disabled 999 full 10G 10Gbase-LR
Te2/3/6 Mmbr HS-400B2-XA-1 err-disabled 999 full 10G 10Gbase-LR
Te2/3/7 Mmbr HS-AD1-XA-1 err-disabled 999 full 10G 10Gbase-LR
Te2/3/8 Mmbr HS-AD211-XA-1 err-disabled 999 full 10G 10Gbase-LR
Te2/3/9 Mmbr HS-AR101B-XA- err-disabled 999 full 10G 10Gbase-SR
Te2/3/10 Mmbr HS-AS1-XA-1 err-disabled 999 full 10G 10Gbase-LR
Te2/3/11 Mmbr HS-AS4-XA-1 err-disabled 999 full 10G 10Gbase-LR
Te2/3/12 Mmbr HS-AV-XA-1 err-disabled 999 full 10G 10Gbase-LR
Te2/3/13 Mmbr HS-BA107-XA-1 connected trunk full 10G 10Gbase-LR
Te2/3/14 Mmbr HS-BA4-XA-1 connected trunk full 10G 10Gbase-LR
Te2/3/15 Mmbr HS-BA4-XA-2 connected trunk full 10G 10Gbase-LR
Te2/3/16 Mmbr HS-BA7-XA-1 connected trunk full 10G 10Gbase-LR
Te2/3/17 Mmbr HS-BA9-XA-1 connected trunk full 10G 10Gbase-LR
Te2/3/18 Mmbr HS-BA12-XA-1 connected trunk full 10G 10Gbase-LR
Te2/3/19 Mmbr HS-BAHUB-XA-1 disabled 999 full 10G No Connector
Te2/3/20 Mmbr HS-BOOKSHOP-X connected trunk full 10G 10Gbase-LR

What do these err-disabled ports connect to?

LMS 4.2 - Err-disable port state

Hello,
I'm trying to figure it out how exactly LMS learns about ports in err-disable state? Which MIB or command is used?
I have two ME3400 switches with err-disabled ports but LMS shows only the ports of one of the them. Both switches are ME-3400-24TS-A
and have the same IOS version (12.2(53)SE). I'm sure data collection is running fine because it updates the other discrepancies.
What i have tried by now:
- did an SNMP walk from LMS on CISCO-ERR-DISABLED-MIB - no info found there on port status
- did an SNMP walk from LMS on CISCO-STACK-MIB - I know that this MIB contains object portAdditionalOperStatus (1.3.6.1.4.1.9.5.1.4.1.1.23) which shows the operational status of the ports, but it seems that ME3400 does not support it (although it supports CISCO-STACK-MIB), because I cannot see the SNMP reponse in the trace:
========================================================================
The following is a SNMP walk of device 192.168.6.89 starting from .1.3.6.1.4.1.9.5.1.4.1.1.23
SNMP Walk Output
.1.3.6.1.4.1.9.5.1.4.1.1.23
CISCO-STACK-MIB::portAdditionalOperStatus = No Such Object available on this agent at this OID
========================================================================
So how does LMS knows which ports are in err-disable state?
Kind regards,
Velin

Hello,
The OID that LMS uses for detecting the err-disabled state of the ports is 1.3.6.1.4.1.9.9.548.1.3.1.1.2 (cErrDisableIfStatusCause) from CISCO-ERR-DISABLE-MIB
Velin

Strange mac address causing err-disable

I have mainly 3550/4506 with port-security. Every day user ports go into err-disable and it's the same few mac addresses each time? anyone else came acreoss this ans know what's it is all about.

It should tell you in the logg why the port is err-disableing the port . Could be as simple as speed/duplex mismatches on the port if they are causing something like a lot of late collisions the switch will err-disable the ports . Check the switch and nic settings for these devices .

BPDU Guard without ERR-Disable

Hi Everyone,
I recently had an instance in one of my networks where a user plugged in a home router to our network. The router then started handing out incorrect IP addresses to clients.
I know I can use DHCP Snooping or BPDU guard to stop this happening again and we do have BPDU Guard running at other sites successfully. The problem has always been if we enable it in a new production network we might disable ports that have legitimate devices on the other end. For example someone is using a small switch to share a port between a PC and a printer.
Is there a way of turning on BPDU guard but without it putting ports into an Err-Disabled mode and just alerting in the logs instead?
Regards, Daniel

Hi Leo,
Thanks for your input in the discussion. However I think you are misunderstanding why I am asking this question.
I WANT to enable BPDU guard on this network, I know its not a PIA and I am well aware of what it does and why it would be implemented.
The reason I am asking this question is because I need to transition from a network that doesn't have BPDU guard enabled to one that does. If i turn the feature on it will start disabling ports on switches and stop peoples workflow until it is resolved. The reason people have unidentified switches plugged into the network might be legitimate, but the way they got around their problem wasn't the best.
My goal is to find out where these rogue switches are, find out why they are there. Find an alternative way to connect these devices to the network by either purchasing new switches or running more cabling. This network does not have any onsite IT and therefor all this needs to be figured out remotely.
So the crux of the problem is. How to find STP devices that are plugged into my switches.
Thoughts?

Gig port down/down (err-disabled) Reason: diagnostics

Hello,
Today I had a 2 ports on Cisco 6509 go into err-disabled state. Both ports show reason "diagnostics". I tried bouncing the interfaces and defaulting the interfaces. Any ideas? Thank you!
Show int status err-disabled:
Port Name Status Reason
Gi1/4 err-disabled diagnostics
Gi1/6 In Patient First F err-disabled diagnostics
Show Version:
Cisco Internetwork Operating System Software
IOS (tm) s3223_rp Software (s3223_rp-IPBASE_WAN-M), Version 12.2(18)SXF16, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by cisco Systems, Inc.
Compiled Tue 03-Mar-09 19:00 by kellythw
Image text-base: 0x40101040, data-base: 0x42A48810
ROM: System Bootstrap, Version 12.2(17r)SX3, RELEASE SOFTWARE (fc1)
BOOTLDR: s3223_rp Software (s3223_rp-IPBASE_WAN-M), Version 12.2(18)SXF16, RELEASE SOFTWARE (fc2)
NOMA17UA01A uptime is 4 years, 34 weeks, 4 days, 23 hours, 36 minutes
Time since NOMA17UA01A switched to active is 4 years, 34 weeks, 4 days, 23 hours, 48 minutes
System returned to ROM by power cycle (SP by power on)
System restarted at 11:49:53 extende Tue Sep 8 2009
System image file is "sup-bootdisk:s3223-ipbase_wan-mz.122-18.SXF16.bin"
cisco WS-C6509-E (R7000) processor (revision 1.4) with 458752K/65536K bytes of memory.
Processor board ID SMG1229N0DT
R7000 CPU at 300Mhz, Implementation 0x27, Rev 3.3, 256KB L2, 1024KB L3 Cache
Last reset from power-on
SuperLAT software (copyright 1990 by Meridian Technology Corp).
X.25 software, Version 3.0.0.
Bridging software.
TN3270 Emulation software.
2 Virtual Ethernet/IEEE 802.3 interfaces
345 Gigabit Ethernet/IEEE 802.3 interfaces
1915K bytes of non-volatile configuration memory.
65536K bytes of Flash internal SIMM (Sector size 512K).
Configuration register is 0x2102
Thank you,
-Nick Chenault

I think Diagnostics means Hardware related issue not Config related, I would contact Cisco as this could a sign of ASIC failure.
Manish

Cisco 3750 Switch SFP Module

Hi all,
I have one 3750 switch( ME-C3750-24TE )with IOS 12.2(25)EY4,
Now I have two SFp Module GLC-SX-MM and i have inserted in four ports of Switch
But nowhere I found it detected via "Sh inventory"
Moreover I have also tried with loop cable (LCPC-FCPC-ATTENTUATOR-FCPC-LCPC)bUT NOT GETTING lED ON ANY PORT
Pl. Guide
I am attaching sh-tech for reference

Hi,
when inserted the SFP module in one port take a look at the output of "show interface gigabitethernetX/Y" watch for a line (I think it is line 5) including the word "media", there should be a short description of the SFP. Also look at the first line of "show interface gigabitethernetX/Y" it could be that the SFP doesn't work in the switch (maybe because it is a none cisco one) then there would be something like "err-disabled". And if you have logging enabled on the switch (e.g. logging buffered 8192 debugging) then there should be an error message also.
The command "show idprom interface gigabitethernetX/Y" shows information about the SFP module in slotX/Y.
Depending on the "err-disable" configuration of the switch ("show err-disable detect" and "show err-disable recovery") a looped interface maybe put in an 'err-disabled' state, see "show interface ..." or "show logging"
HTH
regards
Mark

WCCP ACL on 4506 switch

Hi ,
We have a cisco 4506 switch with the IOS version of 12.2-50.SG1. I would like to know whether any latest IOS version will support redirect ACL with the deny statement for WCCP on a client interface.
Switch details:
cisco WS-C4506-E (MPC8245) processor (revision 7) with 524288K bytes of memory.
Processor board ID FOX1407G5P7
MPC8245 CPU at 333Mhz, Supervisor IV
Last reset from Reload
5 Virtual Ethernet interfaces
192 FastEthernet interfaces
26 Gigabit Ethernet interfaces
403K bytes of non-volatile configuration memory.
Regards,
Bala

Hey CJ,
Option 1: another option you might consider is intercepting closer to the WAN edge, if that's an available option for you.
Again, like Patrick mentioned it depends on your network / IP design but if you intercept closer to the WAN edge you should be able to avoid engineering a redirect ACL altogether.
Option 2: depending on the 3750 platform and code upgrade options, some of the latest 3750 IOS versions include support for deny entries for WCCP redirect ACLs. Check out these release notes (look at the very last bullet point in this list):
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_58_se/release/notes/OL24338.html#wp1009434
Hope this helps!
-Chet

Juniper SSG 20 optical interface connection to Cisco 4506

Let me post the same issue to the Optical forum too:
Hello,
Here's the problem.
There's one Juniper SSG 20 firewall with JX-SFP-1GE-SX multimode fiber interface (850nm) (which I can control) and I have to connect it to Cisco 4506 switch which has WS-X4306-GB module and WS-G5484 GBIC interface (also multimode fiber).
SSG 20 shows link up. Cisco shows link down.
Unfortunatelly I don't have Cisco 4506 to play with, but I have to find solution for this system. Cisco 4506 show version is:
#show version
Cisco IOS Software, Catalyst 4000 L3 Switch Software (cat4000-I9K91S-M), Version 12.2(25)EWA9, RELEASE SOFTWARE (fc3) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Wed 21-Mar-07 12:20 by tinhuang Image text-base: 0x10000000, data-base: 0x115C6158
ROM: 12.2(31r)SGA1
Dagobah Revision 226, Swamp Revision 34
XXXXXXX uptime is 3 weeks, 1 day, 3 hours, 20 minutes System returned to ROM by reload System restarted at 13:19:45 CEST Mon May 19 2008 System image file is "bootflash:cat4000-i9k91s-mz.122-25.EWA9.bin"
I was able to replicate issue with Cisco 3524 swtich (SSG20 shows link up, Cisco link down, physical down), and solution that I found was to enter interface level command: (config-if)#no negotiation auto. After this command, everything was showing state as "UP" and working as expected (there was traffic going through the optic)
When I suggested this command as a solution, administrator from the other side was claiming that this command returns "invalid input detected at ^ marker".
Can anyone tell me is there any known issue between those two products, and maybe alternative to this command, so I can turn off this IEEE 802.3z negotiation if that's the problem.
Thanks for assistance
Cheers
M.

So I found my solution, but I want to know why is like this.
The solution was to enter on Cisco the following command:
(config-if)#speed nonegotiate
From this link: http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.1E/native/configuration/guide/sw_int.html
I can see on section: Configuring Link Negotiation on Gigabit Ethernet Ports that this command is doing negotiation exchange of flow-control parameters, remote fault information, and duplex information. Link negotiation is enabled by default.
And the funniest thing of all is, this speed nonegotiate command doesn't deal with the speed at all :)
Can someone confirm me what are remote fault information and flow control parameters

Port Err-disable report from cisco works

Hi All,
We have network of around 400 switches.
My question is, Is there any way I can pull up the report of Err-disable for all the switches on Cisoworks ( LMS 3.2).
Any help would be appricated.
Thanks,
Samir

No, this is not possible because determining if a port is err-disable is not easily obtainable via SNMP. Campus Manager's Port Attributes report will show you the operational status of ports, but err-disable ports will be down (which is indistinguishable from a port which is unconnected).

Cisco 4506 network switch

i need details of cisco 4506 network switch with supervisor module

Hi,
You can visit
http://cisco.com/en/US/products/hw/switches/ps4324/prod_brochure_list.html
a Good link on 4500 supervisor engines.
Regards
Dinesh
http://Knowurtech.com
(Good technical articles. Submit your articles and get featured on our website. Send email to [email protected] To know the benefits http://www.knowurtech.com/be_an_expert.html)
Hi,
You can visit
http://cisco.com/en/US/products/hw/switches/ps4324/prod_brochure_list.html
a Good link on 4500 supervisor engines.
Regards
Dinesh
http://Knowurtech.com
(Good technical articles. Submit your articles and get featured on our website. Send email to [email protected] To know the benefits http://www.knowurtech.com/be_an_expert.html)

Interfaces in port-channel keep err-disabling because of keepalives

Below is the current portchannel that I am having problems with. The interfaces on Switch A keep going into an error disabled state because they receive their own loopback. Cisco says to disable keepalives and that it will fix the problem, but I do not like the idea of disabling keepalives. Has anyone found a solution other than disabling keepalives? Notice that ios's are different, but am not convinced that this is the issue. Also one is PoE and the other isn't. Lastly, i found this article "Keepalives are sent on all interfaces by default in Cisco IOS Software Release 12.1EA-based software. In Cisco IOS Software Release 12.2SE-based software and later, keepalives are not sent by default on fiber and uplink interfaces". I would think trunked interfaces in a port-channel would be uplink interfaces and if this is true, it should be sending out keepalives anyway since i am running the 12.2SE based ios. Thanks for whatever input you may have.
Switch A
C3750E Boot Loader (C3750X-HBOOT-M) Version 12.2(53r)SE2, RELEASE SOFTWARE (fc1)
System image file is "flash:/c3750e-universalk9-mz.122-55.SE3/c3750e-universalk9-mz.122-55.SE3.bin"
cisco WS-C3750X-48P
Port-channels in the group:
Port-channel: Po52
Age of the Port-channel   = 219d:04h:32m:49s
Logical slot/port   = 10/39          Number of ports = 4
GC                  = 0x00000000      HotStandBy port = null
Port state          = Port-channel Ag-Inuse
Protocol            =    -
Port security       = Disabled
Ports in the Port-channel:
Index   Load   Port     EC state        No of bits
------+------+------+------------------+-----------
0     00     Gi1/0/35 On                 0
0     00     Gi1/0/36 On                 0
0     00     Gi2/0/45 On                 0
0     00     Gi2/0/46 On                 0
%ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back detected on GigabitEthernet1/0/35.
%PM-4-ERR_DISABLE: loopback error detected on Gi1/0/35, putting Gi1/0/35 in err-disable state
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/35, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel39, changed state to down
%LINK-3-UPDOWN: Interface Port-channel39, changed state to down
Switch B
C3750E Boot Loader (C3750X-HBOOT-M) Version 12.2(53r)SE2, RELEASE SOFTWARE (fc1)
System image file is "flash:/c3750e-universalk9-mz.122-58.SE2/c3750e-universalk9-mz.122-58.SE2.bin"
cisco WS-C3750X-48
Port-channels in the group:
Port-channel: Po52
Age of the Port-channel   = 443d:18h:43m:06s
Logical slot/port   = 10/39          Number of ports = 4
GC                  = 0x00000000      HotStandBy port = null
Port state          = Port-channel Ag-Inuse
Protocol            =    -
Port security       = Disabled
Ports in the Port-channel:
Index   Load   Port     EC state        No of bits
------+------+------+------------------+-----------
0     00     Gi1/0/35 On                 0
0     00     Gi1/0/36 On                 0
0     00     Gi1/0/45 On                 0
0     00     Gi1/0/46 On                 0

PER CISCO
Symptom:
An interface on a Catalyst switch is errordisabled after detecting a loopback.
Mar 7 03:20:40: %ETHCNTR-3-LOOP_BACK_DETECTED: Loop-back detected on
GigabitEthernet0/2. The port is forced to linkdown.
Mar 7 03:20:42: %LINK-5-CHANGED: Interface GigabitEthernet0/2, changed state
to administratively down
Mar 7 03:20:43: %LINEPROTO-5-UPDOWN: Line protocol on Interface
GigabitEthernet0/2, changed state to down
Conditions:
This might be seen on a Catalyst 2940, 2950, 2950-LRE, 2955, 2970, 3550, 3560
or 3750 switch running 12.1EA or 12.2SE based code.
Workaround:
Disable keepalives by using the no keepalive interface command. This
will prevent the port from being errdisabled, but it does not resolve the root
cause of the problem. Please see section below for more information.
Additional Information:
The problem occurs because the keepalive packet is looped back to the port that
sent the keepalive. There is a loop in the network. Although disabling the
keepalive will prevent the interface from being errdisabled, it will not remove
the loop.
The problem is aggravated if there are a large number of Topology Change
Notifications on the network. When a switch receives a BPDU with the Topology
Change bit set, the switch will fast age the MAC Address table. When this
happens, the number of flooded packets increases because the MAC Address table
is empty.

N5K err-disabled a port due to DCX-No ACK in 100 PDUs

I'm super new to Nexus, so I'm not really sure how to troubleshoot this. I did a quick search and found that this is related to DCBX TLVs in LLDP, which we apparently shouldn't be getting on a regular ethernet port. I'm pretty sure this is just a regular ethernet port. (Like I said, I'm pretty new to nexus. lol) I wonder if the following output indicates that we are receiving and sending DCBX TLVs in LLDP. If so, it sounds like the interface will go into err-disable state if the server stops sending ACK frames.
# show lldp dcbx int e1/17
Local DCBXP Control information:
Operation version: 00 Max version: 00 Seq no: 1 Ack no: 1
Type/
Subtype    Version    En/Will/Adv Config
004/000     000        Y/N/Y      8906001b21 08
002/000     000        Y/N/Y      0000000064 00000000 00000001
Peer's DCBXP Control information:
Operation version: 00 Max version: 00 Seq no: 1 Ack no: 1
Type/      Max/Oper
Subtype    Version    En/Will/Err Config
004/000     000/000    Y/Y/N      8906001b21 08
003/000     000/000    Y/Y/Y      ff08
002/000     000/000    Y/Y/N      ffffffff00 00000000 00000008
This is the first time we've run into this. Any idea what might really be going on?
Thanks!

Hi,
Per the display it the Server Adapter is doing LLDP DCBX negotiation.
If not needed, then you might want to check the Server adapter settings.
DCBX is an extension of LLDP link layer discovery protocol; not restricted for FCOE usage.
Further informatin on LLDP for Nexus:
http://www.cisco.com/en/US/docs/switches/datacenter/nexus5500/sw/layer2/602_N1_1/b_5500_Layer2_Config_602N11_chapter_01010.html#task_1152779
Thanks!
Regards,
Carlos

Cisco 4506 switch in Err-disable mode

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