Sorry if it sounded like I was guessing.. :-}
Played with issue again last night. Every time that I have seen UP/Down
the cable was detached etc. We install/move/remove a lot of equipment
and it is always up/down...
The line protocol is dependent on the keepalives. Just try a "no keep"
on the interface and UP/UP it will go.
Ran tests on:
2500 AUI
2600 10M RJ45 (half & full duplex)
3600 10M RJ45 (half & full duplex)
4500 100M RJ45 & MII (half & full duplex)
7200 10M RJ45 (half & full duplex)
7200 100M RJ45 (half & full duplex)
7200 100M MII (Believe I did this too but can not remember)
unfortunately the 7500s with Gig & FE MMF ports are being used for spare
parts @tt.
In all cases if keepalives are disabled, the line protocol is up. If
not up/down.
Sniffer shows the keepalive frames as having the same source and
destination mac address. Ethernet type 9000 "LOOP" frame.
I would like to attach the interfaces to the switch, and filter
keepalives out. Maybe [set port protocol slot/mod group off]. I doubt
if that will work, but will try and find out.
PS: it is a nice document & so is the digital research paper.
DaveC
Priscilla Oppenheimer wrote:
>
> I'm looking for a real answer from experience, not documentation. That page
> you sent me was something I helped write!!!! ;-)
>
> Priscilla
>
> At 06:53 PM 4/26/01, David Chandler wrote:
> >Found some info:
> >
> >Interface is UP: means the routers ethernet hardware has been activated.
> >Line Protocol Down: The router never sees any of the keepalives that it
> >sends out.
> >
> >YES: you'll get the same thing with RJ45...
> >
> >
> >http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1904.htm
> >
> >Search for: "show interfaces ethernet Field Descriptions" it'll explain
> >in a little more detail.
> >
> >DaveC
> >
> >Priscilla Oppenheimer wrote:
> > >
> > > I tried to do some more research on this and couldn't get a good
answer.
> > >
> > > Does anyone know exactly in which cases the router reports the
interface
> > > up, down even if there is no cable attached? Looking at show interface
> > > ethernet,
> > >
> > > Router reports up, down with no cable for AUI.
> > >
> > > How about RJ45?
> > >
> > > How about MII?
> > >
> > > GMII?
> > >
> > > Others?
> > >
> > > Thanks
> > >
> > > Priscilla
> > >
> > > > > Priscilla
> > > > >
> > > > > At 08:21 PM 4/25/01, md. nazri wrote:
> > > > > >thanks for the answer...
> > > > > >i understand that LP will down if no connection attach, but why FE
> >still
> > > >up,
> > > > > >does it up forever until we shut it down? Does it apply the same
to
> > > > > >Ethernet..?
> > > > > >----- Original Message -----
> > > > > >From: "Vincent Chong"
> > > > > >To:
> > > > > >Sent: Wednesday, April 25, 2001 3:48 PM
> > > > > >Subject: Re: FastEthernet is up, Line protocol down [7:1828]
> > > > > >
> > > > > >
> > > > > > > 1) I guess you enable the fastethernet port in the running
> > > > > > > configuration. You have to
> > > > > > > shutdown the port, so the port will administrative shut
down
> >and
> > > >line
> > > > > > > protocol down.
> > > > > > >
> > > > > > > 2) Line protocol will up if there is any phyiscal connection
> > > >attached
> > > > > >to
> > > > > > > Fastethernet.
> > > > > > > Becasue the port in your router will detect keepalive
signal,
> > > when
> > > >it
> > > > > > > detected, it will
> > > > > > > up. You can type no keepalive under interface
> configuration,
> > > >the
> > > > > > > ethernet interface
> > > > > > > will keep up even no physical connection. You have to
enable
> >the
> > > > > > > interface, of courese.
> > > > > > >
> > > > > > > Hope this help
> > > > > > > Vincent Chong
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > ""md. nazri"" hi all,
> > > > > > > > got one question regarding FastEthernet on Cisco 2620..
> > > > > > > > why the status showed FastEthernet is up, Line protocol down
> > > >although
> > > > > >the
> > > > > > > > cable was pulled out from the port...in what cases the port
> will
> > > > > >down..any
> > > > > > > > help appreciated
> > > > > > > >
> > > > > > > > tq
> > > > > > > > FAQ, list archives, and subscription info:
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> > > > >
> > > > >
> > > > > ________________________
> > > > >
> > > > > Priscilla Oppenheimer
> > > > > http://www.priscilla.com
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> > >
> > > ________________________
> > >
> > > Priscilla Oppenheimer
> > > http://www.priscilla.com
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> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
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