From: Chuck Larrieu (chuck@xxxxxxxxxxxxx)
Date: Wed Feb 28 2001 - 16:08:12 GMT-3
A better way of looking at this is that no two devices on the same network
may have the same mac / node address.
A single ipx server may provide several services, hence broadcast several
SAPS. Each service needs a separate SPX socket, but can be advertised with a
single node / mac address.
That appears to be the source of the original problem. The loopback
interface is considered as the same network as the router itself. Each
interface, on the other hand, is placed into a different network.
Hope this is a bit clearer than the post below.
Chuck
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Chuck Larrieu
Sent: Wednesday, February 28, 2001 12:35 AM
To: Groupstudy; ccielab@groupstudy.com
Subject: RE: Bootcamp lab#6
I missed the early parts of this thread, so I may be repeating.
Experiments on a 12.1 router and an 11.2 router revealed
Here are a couple of configs. Too tired to write a story tonight.
ipx routing 0005.0005.0005
!
interface Loopback0
no ip address
ipx network 55E
ipx sap 4 printer 55E.0055.0055.0055 555 2
notice that the ipx node number is different than the router ipx node
number.
if you try to use the same node number, you get the error
Router_5(config)#ipx sap 23 unknown 55e.5.5.5 555 2
%Illegal IPX address - can't be local host
Router_5(config)#
>From another router:
ipx routing 0002.0002.0002
!
interface Loopback0
no ip address
ipx network 22B
!
interface Ethernet0
ip address 137.20.20.1 255.255.255.0
ipx network 2B
Router_2(config)#ipx sap 45 special 2b.2.2.2 222 2
Router_2(config)#ipx sap 46 special 22b.2.2.2 222 2
%Illegal IPX address - can't be local host
Router_2(config)#
Notice that if the ethernet interface is the net number, the node number can
be the router node number. but if the loopback net number is used, one can't
use the router node number
Last observation for the evening:
Router_2(config)#ipx sap 55 distant 22b.0010.7b7e.ebd7 365 3
Router_2(config)#
Using the loopback net number and the ethernet node number - works fine and
dandy
Conclusion: the node number has to be different than the node number of the
interface used for the net number.
Make sense? Loopback interface node number is the router itself's node
number. i.e. mac address.
Chuck
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Groupstudy
Sent: Tuesday, February 27, 2001 11:59 PM
To: ccielab@groupstudy.com
Subject: Re: Bootcamp lab#6
I am using 11.3 enterprise.
----- Original Message -----
From: Rogell, Dennis <Dennis_Rogell@milgo.com>
To: 'Frank Wells' <fwells11@hotmail.com>
Sent: Tuesday, February 27, 2001 9:55 AM
Subject: RE: Bootcamp lab#6
> Frank
> I created an ipx network to a loopback interface and that network was
> learned by the other routers. Then I created 2 saps
> using that network number and it worked all the other routers saw the 2
> saps. I never received the message you got, so
> my question would be what code are you running I am using 12.1 but also
got
> it working with 12.0(3)
>
> Dennis Rogell
> Email : dennis_rogell@milgocom
> Phone: (954) 846-5128
>
> > -----Original Message-----
> > From: Frank Wells [SMTP:fwells11@hotmail.com]
> > Sent: Tuesday, February 27, 2001 08:22
> > To: cisco@groupstudy.com
> > Subject: RE: Bootcamp lab#6
> >
> > I tried that at. All I got from IOS was something to the effect: You
> > cannot
> > use a local interface for this operation'
> >
> > I guess what your trying to say is use a loopback on a different router
> > from
> > the one where you want the SAP's advertised form. This doesn't seem to
> > make
> > a whole lot of sense however. You might as well just use an interface
off
> >
> > another IPX router in your network to do this. To use a loopback
> > interface
> > from another router it must have the IPX network advertised from it so
the
> >
> > SAP-originating server can learn it.
> >
> >
> > >From: "Rogell, Dennis" <Dennis_Rogell@milgo.com>
> > >To: 'Groupstudy' <fwells11@hotmail.com>
> > >Subject: RE: Bootcamp lab#6
> > >Date: Tue, 27 Feb 2001 10:24:38 -0500
> > >
> > >What Kevin is saying and I have done this plenty of times with no
problem
> >
> > >is
> > >to configure a loopback address for ipx and use that network number
when
> > >creating saps. Before you create the saps make sure that network is
> > learned
> > >through the networks hope this helps.
> > >
> > >Dennis
> > >
> > >Dennis Rogell
> > >Email : dennis_rogell@milgocom
> > >Phone: (954) 846-5128
> > >
> > > > -----Original Message-----
> > > > From: Groupstudy [SMTP:fwells11@hotmail.com]
> > > > Sent: Monday, February 26, 2001 22:35
> > > > To: ccielab@groupstudy.com
> > > > Subject: Bootcamp lab#6
> > > >
> > > > I am mid-way through bootcamp lab 6. Task Three point 4 asks you to
=
> > > > create 2 SAP's. I tried creating one using local network node and =
> > > > address but IOS does not like that. I then tried to create them
using
> > a
> > >=
> > > > network/node learned from IPX EIGRP. Still no joy. What's up with
=
> > > > that?
> > > >
> > > > I searched the archives and found this interesting comment from our
> > very
> > >=
> > > > own Kevin Bumgardner that seems to imply you can create the SAP's
> > using
> > >=
> > > > local N.H.H.H addresses etc:
> > > >
> > > > =20
> > > > Q: How DO you get it to advertise the static SAPs out the serial =
> > > > interface?
> > > >
> > > >
> > > > A: No problem as long as you don't create a static sap that uses the
> > > > ipx network that is defined on the serial interface and you want
> > > > to send this sap over the serial interface. IPX SAP will not=20
> > > > progate this sap update back out the serial interface. Basically =
> > > > prevented=20
> > > > by split-horizon.=20
> > > >
> > > > Create some loopback interfaces or use a ipx network that is known
> > from
> > > > another router by rip or eigrp. I have found that using loopback =
> > > > interfaces
> > > > with ipx networks and defining the static saps to these loopback =
> > > > interfaces
> > > > works the best.
> > > >
> > > > Kevin
> > > >
> > > > Can someone please clarify this issue for me please.
> > > > =20
> > > >
> > > >
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