10-10-2012 06:09 AM - edited 03-07-2019 09:23 AM
Hi Team,
I have an issue, I have checked the router and found all L2 ports are down but vlan 1 is up...I dont know why it is happening..please have a look in below config output::
Interface IP-Address OK? Method Status Protocol
FastEthernet0 unassigned YES unset down down
FastEthernet1 unassigned YES unset up down
FastEthernet2 unassigned YES unset up down
FastEthernet3 unassigned YES unset up down
But status of vlan 1 is up---
Vlan1 5.2.3.241 YES NVRAM up up<<<<<<<<<<<<<<<<<<<<<
all ports are bydefault configured under vlan1...like below
R1#show vlan-switch id 1
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0, Fa1, Fa2, Fa3 <<<<<<<<<<<<<<<<<<<<<<<<<<<<
Can someone please help me to identify the problem behind this, why vlan1 is showing up as all L2 ports are down??????
Solved! Go to Solution.
10-11-2012 01:46 AM
Hi,
you've got no autostate configured somewhere in the config so the behavior you've got is normal.
you've got to reenable the SVI autostate feature for your vlan 1 interface to be down
maybe this link would be more helpful:http://blog.ioshints.info/2009/07/followup-vlan-interface-status.html
Regards.
Alain
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10-10-2012 07:19 AM
Hi,
can you do sh run | i autostate ?
Regards.
Alain
Don't forget to rate helpful posts.
10-10-2012 09:09 AM
Hi Cadet..Thank you so much for your reply...
Output that you ask is ::
R1#sh run | i autostate
no autostate <<<<<<<<<<<<<<<<<<<<
R1#
Now pls advice me what should I do and why we are getting this unexpected result, your advice would be very helpful.
Thanks in advance.
10-10-2012 09:22 AM
Hi Amit,
Do you have a trunk port up and running? Can you do a show int trunk?
10-10-2012 09:57 AM
Hi,
look at this:
http://routerjockey.com/2011/03/07/svi-autostate/
Regards.
Alain
Don't forget to rate helpful posts.
10-11-2012 01:25 AM
Hi Cadet,
I read the document that u posted in last post...but it was not helpful.
I am still unable to understand why it is happening ..even this is a typical live router and only ethernet module is added under that and all interfaces are configured under vlan1 or accessing vlan1.
There is not any trunk port. All are configured as access port and in down state but vlan1 is showing up.
As i understand about the autostate exclude command, its not working out there , so there could not be any issue created by this command.
Please help me to find out this problem As I am still helpless and even googled is so many times but didn't find any satisfactory answer.
And also I have also seen this kind of issue so many times in different routers as well. And all are customer's live router.
I am again posting the snapshots--
FastEthernet0/0/0 unassigned YES unset up down
FastEthernet0/0/1 unassigned YES unset administratively down down
FastEthernet0/0/2 unassigned YES unset administratively down down
FastEthernet0/0/3 unassigned YES unset administratively down down
Vlan1 10.184.253.250 YES NVRAM up up
R1#sh vlan-switch
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/0/0, Fa0/0/1, Fa0/0/2, Fa0/0/3
There is no trunk---
R1#sh int trunk
R1#
No Autoexclude is configured bydefault---
R1#sh run | i auto
no autostate <<<<<<<<<<<<<<<<
And this Router and IOS version is below---
hels-h_exeter_02#sh ver
Cisco IOS Software, 3800 Software (C3845-SPSERVICESK9-M), Version 12.4(25), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Tue 21-Apr-09 15:50 by prod_rel_team
ROM: System Bootstrap, Version 12.4(13r)T11, RELEASE SOFTWARE (fc1)
hels-h_exeter_02 uptime is 33 weeks, 1 day, 49 minutes
System returned to ROM by power-on
System restarted at 07:26:57 GMT Wed Feb 22 2012
System image file is "flash:c3845-spservicesk9-mz.124-25.bin"
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
export@cisco.com.
Cisco 3845 (revision 1.0) with 486400K/37888K bytes of memory.
Processor board ID FCZ141972RN
4 FastEthernet interfaces
2 Gigabit Ethernet interfaces
DRAM configuration is 64 bits wide with parity enabled.
479K bytes of NVRAM.
126976K bytes of ATA System CompactFlash (Read/Write)
Configuration register is 0x2102
All interface configuration---
interface FastEthernet0/0/0
description * LAN Backup *
no snmp trap link-status
no cdp enable
!
interface FastEthernet0/0/1
shutdown
no snmp trap link-status
!
interface FastEthernet0/0/2
shutdown
no snmp trap link-status
!
interface FastEthernet0/0/3
shutdown
no snmp trap link-status
I think all these information would be helpful to all you guys...to understand why vlan1 is showing up up when all L2 interfaces are down...Hoping some right answers....
10-11-2012 01:46 AM
Hi,
you've got no autostate configured somewhere in the config so the behavior you've got is normal.
you've got to reenable the SVI autostate feature for your vlan 1 interface to be down
maybe this link would be more helpful:http://blog.ioshints.info/2009/07/followup-vlan-interface-status.html
Regards.
Alain
Don't forget to rate helpful posts.
10-11-2012 03:51 AM
Awesome Cadet..now i understood by your last link.....Thnak you so much for helping me out in this problem...
By disabling through no autostate command vlan is not tracking any uplick port configured under that interface so, if any port status will go down...even if all...then it wont made any changes in vlan state it will show up up.
Thanks for this information brother..
But i am also looking for some help from your end if u can...Can you please provide me some better case-study or topology-based Switch protocol study material that will speacially help me to understand all switch protocol like STP, PVST, RSTP eo else in depth....
Thanks in advance..
10-10-2012 01:45 PM
Is this a new config? Do you have anything connected to those ports? What does it show if you do
"show runn interface fa0"
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