North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: More 6509 problems...
Danny, You are correct. In later code you cannot disable dCEF either. hth, rodney On Tue, Jan 30, 2001 at 08:27:24PM -0600, Danny Snyder wrote: > Now that I think about it, I was given somewhat of an explanation of what > was happening.....I didn't remember until now though. > > Basically the MSFCs act as the route processors for the 6509s. A simple > description of what these do is inter-VLAN routing. If you look at show > trunk off of the Supervisor engine on a 6509, you see that there is an ISL > trunk from the supervisor to the MSFC. In an ethernet-only environment, > this is no big deal and is fairly straight-forward. In the case of the > FlexWAN modules, the switch creates a "hidden" VLAN- that is a VLAN numbered > outside the allowed range for VLAN ids. If for some reason this VLAN cannot > be created and associated with the serial (or other interface off of the > FlexWAN), the circuit shows as being up/down when it should be up/up because > the communication between the FlexWAN module and MSFC isn't happening > correctly. > > With IOS 12.1.3aE4 (also earlier versions, but I'm not sure how much > earlier) on the MSFC, cef is enabled and cannot be turned off. Again, this > does not present a problem for an ethernet network. With the FlexWAN, > distributed cef must be enabled for the hidden VLAN to be created correctly. > There are debugging commands to see what is going on with the hidden VLANs, > but you cannot get information about these through non-debugging commands. > Once the hidden VLAN is created correctly, the interface can go up/up since > communication between the FlexWAN and MSFC is then allowed to happen. > > I didn't ask for details as to what specifically happens with distributed > cef turned vs. having it turned off, and I was really suprised that not > having *one* global configuration command was causing all of my problems.... > > That's everything I can recall about this....hope that helps. > > --Danny > > > > > -----Original Message----- > From: [email protected] [mailto:[email protected]]On Behalf Of > Rodney Dunn > Sent: Thursday, February 01, 2001 5:22 PM > To: Danny Snyder > Cc: Kenny Sallee; [email protected]; [email protected] > Subject: Re: More 6509 problems... > > > > Danny, > > The interface status should be independent of > the swithcing path. I've never seen the line > state be affected by the switching mechanism > (although I have seen the opposite). > > Can you email me the case# you had so I can take > a look? > > rodney > > > On Tue, Jan 30, 2001 at 02:22:21PM -0600, Danny Snyder wrote: > > > > Ya got me on that one....Cisco didn't really say why and I didn't think to > > ask them either.... > > > > --Danny > > > > > > > > > > -----Original Message----- > > From: Kenny Sallee [mailto:[email protected]] > > Sent: Tuesday, January 30, 2001 11:28 AM > > To: [email protected]; 'Danny Snyder' > > Cc: [email protected] > > Subject: Re: More 6509 problems... > > > > > > How would CEF cause an interface to be up/down? Just curious....Kenny > > > > ----- Original Message ----- > > From: "Alison Gudgeon" <[email protected]> > > To: "'Danny Snyder'" <[email protected]>; <[email protected]> > > Sent: Tuesday, January 30, 2001 8:36 AM > > Subject: RE: More 6509 problems... > > > > > > > > > > Hi > > > > > > Hybrid IOS > > > > > > I've got IP CEF DISTRIBUTED set globally. Did you have it enabled or > > > disabled on the T3 interface? > > > > > > Ali > > > > > > -----Original Message----- > > > From: Danny Snyder [mailto:[email protected]] > > > Sent: 30 January 2001 16:21 > > > To: [email protected]; [email protected] > > > Subject: RE: More 6509 problems... > > > > > > > > > Alison, > > > > > > I've had VERY similar problems with a 6509 (Sup 1a + MSFC2) with a > FlexWAN > > > and a PA-2T3+. After spending the better part of two weeks on the phone > > > with Cisco, we finally determined that ip cef distributed needed to be > > > turned on in global configuration. > > > > > > Also, are you running native IOS or Catalyst OS on the Supervisor and > IOS > > on > > > the MSFC ? > > > > > > Danny Snyder > > > Network Administrator > > > NowDocs, Inc. > > > > > > > > > > > > > > > -----Original Message----- > > > From: [email protected] [mailto:[email protected]]On Behalf Of > > > Alison Gudgeon > > > Sent: Tuesday, January 30, 2001 10:18 AM > > > To: [email protected] > > > Subject: More 6509 problems... > > > > > > > > > > > > Hi, > > > > > > Is anyone doing the following: > > > > > > 6509 (supervisor 1a + msfc) - with a flexWAN adapter to take a Packet > Over > > > Sonet OC-3 card. > > > > > > I'm having great problems getting up/up on the interface, the current > > > situation is up/down, a hardware loop at the telco kit brings the line > > up/up > > > but otherwise just up/down. Config is default I've just put IP's on. > > > > > > I'm running very new code - 12.1(4)E1 > > > > > > many thanks in advance for any help. > > > > > > > > > Kind Regards > > > > > > > > > Alison > > > > > > > >
|