From: Erick B. (erickbe@xxxxxxxxx)
Date: Tue Apr 03 2001 - 10:59:06 GMT-3
>From my experience, if a Windows 95/98 box is
configured with DHCP and IRDP is being used the
default gateway will change when the IRDP timers, hold
time, etc expire.
IRDP doesn't work with a staticly defined gateway. I
haven't tested IRDP with a static IP address and no
default gateway specified.
--- tom cheung <tkc9789@hotmail.com> wrote:
> What about IRDP? How would one set up a Windows
> client without a default
> gateway and take advantage of IRDP?
>
>
> >From: "Pickell, Aaryn"
> <Aaryn.Pickell@getronics.com>
> >Reply-To: "Pickell, Aaryn"
> <Aaryn.Pickell@getronics.com>
> >To: "'Bowen, Shawn'" <sbowen@neteffectcorp.com>,
> Tariq Sharif
> ><tariq_sharif@btinternet.com>,
> "Ccielab@Groupstudy. Com"
> ><ccielab@groupstudy.com>
> >Subject: RE: Proxy ARP
> >Date: Mon, 2 Apr 2001 19:23:05 -0400
> >
> >Proxy arp is also useful when you have your subnet
> masks misconfigured.
> >Say, for example, the router has two /24 segments
> attached. If there is a
> >host configured with a /23 instead, it will try
> arping for addresses which
> >are not actually directly connected. The router
> will respond with its own
> >MAC and then forward the traffic.
> >
> >They use this in access servers as well. Assume a
> large modem bank on an
> >AS5300, with a bunch of users dialing in. Each of
> these users is given an
> >address from the segment that's attached to the
> ethernet segment. When
> >hosts actually on that ethernet wish to talk to the
> dial-in users, they
> >believe them to be directly connected, so they arp.
> The AS5300 will
> >respond
> >with its own MAC and forward the packets correctly.
> >
> >Aaryn Pickell - CCNP, CCDP, MCSE
> >Senior Engineer - Routing Protocols
> >Getronics Inc.
> >Direct: 713-394-1609
> >Email:aaryn.pickell@getronics.com
> >
> >
> > > -----Original Message-----
> > > From: Bowen, Shawn
> [mailto:sbowen@neteffectcorp.com]
> > > Sent: Monday, April 02, 2001 5:50 PM
> > > To: Tariq Sharif; Ccielab@Groupstudy. Com
> > > Subject: RE: Proxy ARP
> > >
> > >
> > > With Microsoft clients there is a way to "Set
> all segments as
> > > local" so to
> > > speak, I forget how off the top of my head but
> this will work
> > > as well. Now
> > > as to proxy ARP, the workstation, be it Unix or
> Microsoft looks at the
> > > destination IP and compares it's own IP and MASK
> to see if it
> > > is local, if
> > > it is then it will be encapsulated in an
> Ethernet (or whatever other
> > > topology you are using) frame and then put on
> the wire, if
> > > the destination
> > > network is on a different segment then your
> machine will not
> > > know what to do
> > > with it unless there is a default gateway setup
> (or you set
> > > "all subnets
> > > local"). This is why you are seeing this; it is
> perfectly
> > > normal in the
> > > Unix, Novell, and Windows world.
> > >
> > > As another example. With a Microsoft dial-up
> > > networking setup you
> > > set it to obtain it's address automatically,
> sometime do a
> > > "winipcfg" on
> > > 95/98 or an ipconfig /all in NT and check out
> your IP and
> > > Default gateway,
> > > they will normally be the same, this is because
> the ISP is
> > > doing proxy arp
> > > and the machine then knows to send ALL traffic
> to the
> > > interface as local
> > > traffic, the router will deal with the rest.
> > >
> > > Shawn
> > >
> > > -----Original Message-----
> > > From: Tariq Sharif
> [mailto:tariq_sharif@btinternet.com]
> > > Sent: Monday, April 02, 2001 6:31 PM
> > > To: Ccielab@Groupstudy. Com
> > > Subject: Proxy ARP
> > >
> > > In Doyle's TCP/IP book (page 69-70) & in other
> text there is
> > > about Proxy
> > > ARP. Says that hosts without any default gateway
> can be issue
> > > ARP & LAN
> > > router (knowing where the destination is) will
> issue PROXY
> > > ARP reply. So the
> > > local host (without default gateway) can reach
> remote hosts.
> > > I can't see
> > > this working with NT 4 or Win 95 unless I assign
> the PCs own
> > > address as its
> > > default gateway. My question is, do Unix clients
> behave the same as
> > > Microsoft clients? If so, what am I missing?
> > >
> > >
> > > Many thanks & regards.
> > >
> > > Tariq Sharif
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:29:39 GMT-3