Solved

3550 Series Switch Link Force Up

Posted on 2008-06-24
12
1,908 Views
Last Modified: 2010-01-16
After completing command  "show int g0/11", I see the following:
Link type is force-up.

How do I change this to auto?
0
Comment
Question by:cdeons
  • 4
  • 3
  • 2
  • +2
12 Comments
 
LVL 32

Expert Comment

by:harbor235
ID: 21858874
Post the entire show interfaces without private info;

what GBIC type are you using?

harbor235 ;}
0
 

Author Comment

by:cdeons
ID: 21859036
config t
int g0/11
speed 1000 (I get a message saying the "changed stat to down"
duplux auto (I get a message saying "Gigabit port is restricted to full duplex"
exit
exit
show int g0/11 (Full -duplex mode, link type is fource-up, unknown 4)

How do I find out what GBIC I am using?
0
 
LVL 32

Expert Comment

by:harbor235
ID: 21860043
sh interfaces will show you the gbic type if it can determine it, I think you may have an off brand. More info is necessary.

the unkown after force-up is a indicator.

harbor235 ;}
0
 
LVL 11

Expert Comment

by:donmanrobb
ID: 21860476
If you set the speed of the port to 1000 the duplex has to be full-duplex so the auto command will not work.
0
 
LVL 57

Expert Comment

by:giltjr
ID: 21862169
Responders may want to look at

http://www.experts-exchange.com/Hardware/Networking_Hardware/Switches/Q_23511970.html

same basic issue from the same poster.
0
Superior storage. Superior surveillance.

WD Purple drives are built for 24/7, always-on, high-definition security systems. With support for up to 8 hard drives and 32 cameras, WD Purple drives are optimized for surveillance.

 
LVL 11

Expert Comment

by:donmanrobb
ID: 21862185
So can you post the show interface / show run int g0/11?
0
 

Author Comment

by:cdeons
ID: 21865661
Output of "show int g0/11":
GigabitEthernet0/11 is down, line protocol is down
   MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec
     Reliability 255/255, txload 1/255, rxload 1/255    
   Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex mode, link type is forc-up unknown 4
  output flow-control is unsupported, input flow-control is unspported, 1000Mbs




show run interface g0/11 output:

interface GigabitEthernet0/11
switchport access valn 37
switchport mode access
switchport nonegotiate
no ip address
duplex full
speed 1000
no cdp enable
end
0
 
LVL 11

Expert Comment

by:donmanrobb
ID: 21866268
No problems there, is the port plugged into anything?
0
 

Author Comment

by:cdeons
ID: 21866420
Yes. That port is set speed 1000, duplex full, auto-negotication on
0
 
LVL 11

Expert Comment

by:donmanrobb
ID: 21867372
What is it plugged into?

If a Cisco device, can you post the interface outputs?
0
 

Accepted Solution

by:
bravo364 earned 50 total points
ID: 22006534
config t
(config)#int g i 0/11
(config-if)#no speed nonnonegotiate

This clears the port that was set to force the connection to not negotiate the uplink speed. I ran into this as well and it appears that someone was troubleshooting some CRC errors on a fiber connection.

0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is a how to to configure a UCS Ethernet-uplink portchannel via the console. It is easy to do and can be done quite quickly. In certain versions of the UCS manager the portchannel has issues coming up and this is a workaround. I am…
I eventually solved a perplexing problem setting up telnet for a new switch.  I installed a new Cisco WS-03560X-24P switch connected to an existing Cisco 4506 running a WS-X4013-10GE Sup II-Plus. After configuring vlans and trunking,  I could no…
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…
Both in life and business – not all partnerships are created equal. As the demand for cloud services increases, so do the number of self-proclaimed cloud partners. Asking the right questions up front in the partnership, will enable both parties …

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now