From: Mahmud, Yasser (YMahmud@Solutions.UK.ATT.com)
Date: Thu Dec 05 2002 - 20:32:59 GMT-3
Jack,
The router R2 will know that 4000.4000.4000 is reachable via R4 so if it
needs to communicate to the host with MAC address 4000.4000.4000 it will
send an explorer to R4 for comm. to host
via R4.
The benefit of having mac-exclusive on R4 is that R2 will send explorers
only for 4000.4000.4000 to R4 and not any other explorers for other MAC
addresses to R4
So really the question should say
Config R4 to peer to R2. Ensure that R2 never sends explorers other
than (instead of for) 4000.4000.4000 which is the only resource available
through R4"
If someone doesn't agree please let me know why as I want to sure my
understanding is correct
Thks,
Yasser
> -----Original Message-----
> From: Jack [SMTP:cathydelagarza@yahoo.com]
> Sent: Wednesday, December 04, 2002 8:07 PM
> To: Mahmud, Yasser
> Subject: RE: DLSW ICANREACH/ICANTREACH in a pure Ethernet Environment
>
> when you use the icanreach/icannotreach statements
> these are exchanged capabilities during connection
> (not circuit) set up; therefore the routers will
> consult this prior to sending explorers.
>
> --- "Mahmud, Yasser" <YMahmud@Solutions.UK.ATT.com>
> wrote:
> > > Hi,
> > > Just wanted check if I'm missing something.
> > > The question seems wrong to me
> > >
> > > If 2 hosts want to communicate they have to send
> > explorers to create the
> > > circuit.
> > > How is the below possible without explorers??
> > >
> > > Thks
> > > Yasser
> > >
> > > -----Original Message-----
> > > From: MOLINA, MARTIN J (PBI) [SMTP:mm1343@sbc.com]
> > > Sent: Tuesday, December 03, 2002 6:20 PM
> > > To: 'ccielab@groupstudy.com'
> > > Subject: DLSW ICANREACH/ICANTREACH in a pure
> > Ethernet Environment
> > >
> > > Hello,
> > > I'm not sure this post will make it to the group
> > since I have had trouble
> > > in
> > > the past but here it goes:
> > >
> > > If one were presented with the following
> > requirement:
> > > "Config R4 to peer to R2. Ensure that R2 never
> > sends explorers for
> > > 4000.4000.4000 which is the only resource
> > available through R4"
> > > R2 and R4 are Ethernet only. My question is this-
> > If I choose to configure
> > > a
> > > DLSW ICANREACH statement on R4 to satisfy this
> > requirement, should the
> > > command be :
> > > dlsw icanreach mac-exclusive
> > > dlsw icanreach mac-address 0200.0200.0200 mask
> > ffff.ffff.ffff
> > > or
> > > dlsw icanreach mac-exclusive
> > > dlsw icanreach mac-address 4000.4000.4000 mask
> > ffff.ffff.ffff
> > > In other words, do I need to bit-swap in an
> > Ethernet only environment?
> > > Thanks in advance
> > >
> > >
> > >
> > > Martin Molina
> > > Senior Network Engineer
> > > SBC (Pacific Bell) Internet Services
> > > CCNP CCDP
> > > desk: (925) 973-7774
> > > cell: (925) 216-5299
>
>
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This archive was generated by hypermail 2.1.4 : Fri Jan 17 2003 - 17:21:39 GMT-3