Also , for # 2 , if a correct LECS address is specified and for some reason
the major interface it is configured on is down
the entire LANE cloud will be down. Also, on some IOS revisions if ILMI is
used for learning ATM NSAP prefixes and someone,possibly an engineer from
Cisco Systems, accidentally wipes out the pvc that ilmi is using, this will
also cause a LANE client to fail to find a LECS. I know this to be true
because this actually happened to our network about 2 weeks ago!!! Not a
pretty sight.
Jerry VanHise
-----Original Message-----
From: Wong, Van [mailto:[EMAIL PROTECTED]]
Sent: Monday, May 08, 2000 2:19 PM
To: 'E. Carolina Arias S.'; Jonathan Hays
Cc: Schmendrick Dawes; [EMAIL PROTECTED]
Subject: RE: CCIE review....
> > 1)Who handles retransmission between two ethernet hosts over HDLC serial
links if there is a line hit? Router or hosts?
Ethernet hosts do not do retransmissions. (except for LLC2 connections)
Higher Level Layers handle the retransmissions... So it's a terminology
question, if they mean "TCP/IP" hosts, then the hosts do retransmit the
"packet".
> > 2)What are some typical reasons that a Lec could fail to find a lecs in
ATM LANE?
Incorrect LECS address specified.
> > 3)What does a star (asterisk *) next to the S mean in a routing table?
* means candidate default network. In the case of *S, the static route is a
candidate default route.
> > 4)How does IPX queuing work with STUN?
STUN is for sdlc traffic so I don't see any affiliation with IPX queuing...
-----Original Message-----
From: E. Carolina Arias S. [mailto:[EMAIL PROTECTED]]
Sent: Monday, May 08, 2000 4:16 AM
To: Jonathan Hays
Cc: Schmendrick Dawes; [EMAIL PROTECTED]
Subject: Re: CCIE review....
I'll try to help with no. 1, any comment is welcome
HDLC does error detection but no recovery, this is, hdlc discards bad
frames, but doesn't ack therefore doesn't handle retransmission. So it'll be
hosts - at layer 4 - the ones handling retransmissions.
Jonathan Hays wrote:
> Tough questions - the only one I can help with is Number 3: look at the
> codes and you will see that the asterisk indicates a default route:
>
> 7206-A#sh ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
>
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
> default
> U - per-user static route, o - ODR, P - periodic downloaded
> static route
> T - traffic engineered route
>
> Schmendrick Dawes wrote:
>
> > While doing a scan of my review outline, I realized
> > there were several points I was unclear on in my weak
> > areas....
> >
> > 1)Who handles retransmission between two ethernet
> > hosts
> > over HDLC serial links if there is a line hit? Router
> > or hosts?
> >
> > 2)What are some typical reasons that a Lec could fail
> > to find a lecs in ATM LANE?
> >
> > 3)What does a star (asterisk *) next to the S mean in
> > a routing table?
> >
> > 4)How does IPX queuing work with STUN?
> >
> > Any help on any of these weak areas would be
> > appreciated!
> > Thanks........
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Send instant messages & get email alerts with Yahoo! Messenger.
> > http://im.yahoo.com/
> >
> > ___________________________________
> > FAQ, list archives, and subscription info: http://www.groupstudy.com
> > Posting Guidelines: http://www.groupstudy.com/list/guide.html
>
> ___________________________________
> FAQ, list archives, and subscription info: http://www.groupstudy.com
> Posting Guidelines: http://www.groupstudy.com/list/guide.html
--
E. Carolina Arias Serna
Consorcio Red Uno
Ingenierķa Datos
Sector Servicios
[EMAIL PROTECTED]
56244400 E4828
___________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com
Posting Guidelines: http://www.groupstudy.com/list/guide.html
___________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com
Posting Guidelines: http://www.groupstudy.com/list/guide.html
___________________________________
UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
