errdisable time out

[mahesh18]

Hi all,

i have switch port on cat os whichis errdisabled

sh port 7/28

* = Configured MAC Address

# = 802.1X Authenticated Port Name.

Port Name Status Vlan Duplex Speed Type

----- -------------------- ---------- ---------- ------ ----------- ------------

7/28 errdisable 159 auto auto 10/100BaseTX

Port AuxiliaryVlan AuxVlan-Status

----- ------------- --------------

7/28 none none

Port Security Violation Shutdown-Time Age-Time Max-Addr Trap IfIndex

----- -------- --------- ------------- -------- -------- -------- -------

7/28 disabled shutdown 0 0 1 disabled 237

Port Flooding on Address Limit Last-Src-Addr Vlan

----- ------------------------- ----------------- ----

7/28 Enabled - -

Age-Left Shutdown/Time-Left

----- -------- ----------------- ---- -------- ------------------

7/28 0 - - - - -

Port 802.1X Auth-State 802.1X Port-Status

----- ------------------ ------------------

7/28 - -

----- --------------------- ---------------------------

7/28 Disabled (null)

Port Broadcast-Limit Multicast Unicast Total-Drop Action

-------- --------------- --------- ------- -------------------- ------------

7/28 - - - 0 drop-packets

Mode Group Id

----- ---------- -------------------- ----- -----

7/28 errdisable off 510 0

Port Status ErrDisable Reason Port ErrDisableTimeout Action on Timeout

---- ---------- ------------------- ---------------------- -----------------

7/28 errdisable duplex-mismatch Enable No Change

Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize

----- ---------- ---------- ---------- ---------- ---------

7/28 0 0 0 0 0

Port Single-Col Multi-Coll Late-Coll Excess-Col Carri-Sen Runts Giants

----- ---------- ---------- ---------- ---------- --------- --------- ---------

7/28 0 0 0 0 0 0 0

Port Last-Time-Cleared

----- --------------------------

7/28 Wed May 13 2009, 12:28:18

Idle Detection

--------------

--

sh errdisable-timeout

ErrDisable Reason Timeout Status

--------------------------------------- --------------

bcast-suppression disable

bpdu-guard disable

cam-monitor disable

channel-misconfig disable

duplex-mismatch disable

ethernet-oam disable

gl2pt-ingress-loop disable

gl2pt-threshold-exceed disable

gl2pt-cdp-threshold-exceed disable

gl2pt-eoam-threshold-exceed disable

gl2pt-stp-threshold-exceed disable

gl2pt-vtp-threshold-exceed disable

link-inerrors disable

link-rxcrc disable

link-txcrc disable

packet-buffer-error disable

udld disable

other disable

Interval: 300 seconds

Port ErrDisable Reason Port ErrDisableTimeout Action on Timeout

---- ------------------- ---------------------- -----------------

7/28 duplex-mismatch Enable No Change

twr1-as14a1> (enable)

So errdsiable timeout means after 300secs the switch will try to renable the port or not?

this i want to know

thanks

mahesh

[Jon Marshall]

Mahesh

Yes it should but then unless you fix the underlying problem the switch will simply errdisable the port again -

http://www.cisco.com/en/US/tech/tk389/tk214/technologies_tech_note09186a0080093dcb.shtml

Edit - Mahesh, apologies but no it won't try to reenable the port -

duplex-mismatch disable

the disable bit in the line above means that the timeout has not been applied so it will stay in errdisable mode. You need to enable the duplex-mismatch timeout for the switch to automatically try and reenable the port. You would still need to fix the underlying problem.

Apologies for the original misinformation.

Jon

[mahesh18]

Hi jon,

so myunderstanding is that right now it only shows us reason for error disable.

to recover from errdisable we have to enable the option

dulex mismatch --enable

also if in future it went to errordisabled due to bpdu-guard it will show then as errdisable reason bpdu-guard .right?

and if i want that port should be enabled automaticall from errdisabled we should use this command

set errdisable-timeout enable ?

bpdu-guard BPDU Port-guard

channel-misconfig Channel misconfiguration

duplex-mismatch Duplex Mismatch

udld UDLD

other Reasons other than the above

all Apply errDisable timeout to all reasons

m,any thanks

mahesh

[Jon Marshall · Accepted solution]

Mahesh

"so myunderstanding is that right now it only shows us reason for error disable.

to recover from errdisable we have to enable the option

dulex mismatch enable"

"set errdisable-timeout duplex-mismatch" will only tell the switch to try to reenable the port after the errdisable-timeout. What it won't do is fix the problem. So you need to actually set the duplex so that there is no mismatch.

Then to reenable the port you could either wait until the timeout, providing you have entered the ""set errdisable-timeout duplex-mismatch" command or you can simply reenable the port from the CLI ie.

set port / enable

See this link for full details -

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/catos/7.x/command/reference/set_f_l.html#wpxref53213

Jon

[mahesh18]

Hi jon,

Many thanks again.

mahesh