From: elping (elpingu@xxxxxxxxxx)
Date: Fri Jun 14 2002 - 01:21:00 GMT-3
I have configured secondaries on ospf and it works.......just define the second
ary
on another area .
Jason Sinclair wrote:
> Kris,
>
> Some answers/thoughts are in-line below.
>
> Cheers,
>
> Jason Sinclair CCIE #9100
> Manager, Network Control Centre
> POWERTEL
> 55 Clarence Street,
> SYDNEY NSW 2000
> AUSTRALIA
> office: + 61 2 8264 3820
> mobile: + 61 416 105 858
> email: sinclairj@powertel.com.au
>
> -----Original Message-----
> From: kris.keen@aon.com.au [mailto:kris.keen@aon.com.au]
> Sent: Friday, 14 June 2002 12:54
> To: ccielab@groupstudy.com
> Subject: Few Questions
>
> Hi All,
>
> This may be a bit of the topic but I'd appreicate the help.
>
> 1) Whats the advantage of secondary addressing, design problems,
> implementation problems, how do routing protocols handle this?
> Issue with OSPF is that it does not run on secondaries.
> Usually used for migration, LAN extension ,etc. Generally not a good design
> practice.
> 2) how many bytes are using in mppp frames for seq and reassembly
> As per RFC 1990 there is 4 bytes assigned for sequencing.
> 3) D channel uses out of band signling for BRI/PRI implementations, does B
> channels use in band? I just need to be clear
> The D-Channel is actually the OOB signalling channel for the
> B channels.
> 4) I understand that STUN with Direct encapsulation is the fastest method,
> is this correct? i believe this provides no error recovery like TCP
> Rather than saying fastest, it would be better to say it is
> more efficient as there is less overhead. That said, there is no error
> recovery mechanism and you cannot re-route around failures, etc.
> 5) a larger X25 window size will allow x25 to be more efficent?
> Generally yes, however X.25 was designed to be very reliable
> with a lot of in-built error checking mechanisms. Thus on noisy or dirty
> lines a larger window size may actually reduce performance as there is more
> data to retransmit in a failure.
> 6) how do routing protocols work with the NBMA problem on Frame Relay, as I
> understand it the broadcast keyword enables broadcasts to be forwared
> across Frame Relay allow routing protocols to work.
> Again, generally yes.
>
> These are in relation to the CID exam I just failed. I believe these are
> points I need to know and I wasnt too clear on. Very badly worded exam,
> would appreicate some assistance.
>
> Regards
>
> -----------------------------------------------------------------
> Kris Keen - CCDA, CCNP, CNE
> Network Support Specialist - Network Systems
> Aon Risk Services Australia Limited
> (612) 9253 7272
> 0404862970
> E: Kris.Keen@aon.com.au
>
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