I actually think it depends on what encapsulation
is running accross the serial link. If you're using
HDLC then it's a connection oriented, reliable
protocol... meaning if a packet is lost in transit
accross the serial link, the router will knw it when
it receives a response from the destination router.
It'll then resend the frame. If you're using a
datagram protocol, like ppp, however, it will rely on
the upper layer protocols to detect missing data..
--- Brant Stevens <[EMAIL PROTECTED]> wrote:
> The question is if Router B and Router C are
> routing, or if they are
> bridging... If they are routing, then Router B
> would re-transmit a packet.
> If bridging is happening, then Host A would
> retransmit...
>
> Hope this helps...
>
> Brant I. Stevens
> Internetwork Solutions Engineer
> Thrupoint, Inc.
> 545 Fifth Avenue, 14th Floor
> New York, NY. 10017
> 646-562-6540
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of
> Dennis Laganiere
> Sent: Wednesday, February 07, 2001 11:32 PM
> To: '[EMAIL PROTECTED]'
> Subject: not quite sure...
>
>
> I've tried to diagram this question to make it
> clear...
>
> Host A is sending to Host D...
>
> A line error occurs on the serial link between
> Router-B and Router-C while
> passing a packet from Host-A to Host-B
>
> Devices - Host A---------ROUTER B---------ROUTER
> C--------HOST D
> Interfaces - (A1) (B1) (B2) (C1)
> (C2) (D1)
>
> What device would rebroadcast?
>
> I think that router-B (port B2) would realize an
> error had occured, and
> would resend, so the answer should be port B2, but
> I've been through all my
> books and can't find anything to confirm or deny my
> conclusion...
>
> Any thoughts?
>
> _________________________________
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