From: Rus Healy (k2ua@earthlink.net)
Date: Tue Dec 21 2004 - 14:52:18 GMT-3
For what it may be worth, advice I've gotten from active CCIE lab proctors
is, "Nail down everything you can." This includes things like OSPF router
IDs, OSPF auto-cost reference bandwidths, priorities for HSRP and OSPF,
frame relay DLCI mapping, etc. In some places this is mandated, but in
others it's not--do it wherever you can.
Mainly this recommendation comes from the fact that you may configure
something that works, but if the routers are bounced for whatever reason, it
may not work the way it did before the reset. For example, the proctors
can't guarantee that your system won't be rebooted before it's graded.
Anyway, this is an item to add to that list of things to nail down.
Cheers,
Rus
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> alsontra@hotmail.com
> Sent: Wednesday, December 15, 2004 5:08 PM
> To: 'Edwards, Andrew M'; 'Group Study'
> Subject: RE: IPV6 Recursive Routing - ATM FRAME ISDN?
>
>
> Cool. Statically defining the local-link addresses would seem prudent. I
> will do so in the future.
>
> I've used the following protocols over v4 tunnels.
>
> NAT-PT v4v6, v6v4 <---good
> MP BGP IPV6 <---good
> RIPng <---good
> ISIS <--- can't seem to get it run over a tunnel
> OSPFv3 <---haven't tried
>
> TIA
> Al
>
> -----Original Message-----
> From: Edwards, Andrew M [mailto:andrew.m.edwards@boeing.com]
> Sent: Wednesday, December 15, 2004 9:33 AM
> To: alsontra@hotmail.com; Group Study
> Subject: RE: IPV6 Recursive Routing - ATM FRAME ISDN?
>
> Alsontra,
>
> I have found that link-local addresses combined with the neighbor
> discovery process (ICMP) in IPv6 is the equivalent of ARP in IPv4.
> Basically you don't have ARP for IPv6. Instead you get the combined
> action of neighbor discovery and link-local addresses.
>
> It is my opinion when you look at NBMA interfaces for IPv6, that you
> statically set the link-local address so that the remote router doesn't
> change it on you after a reboot (remember that the link-local address
> setting procedure is dynamic to a device). And, since frame relay
> interfaces/serial/atm don't have a mac address associated with them,
> they will have to take one from the local router pool thereby meaning it
> could change. And statically mapping link-local addresses on one end
> that can change on the other is a bad idea and something I think you
> might be enticed to do in a lab environment.
>
> My 2cents.
>
> Anyone had any luck with the various IPv6 over ipv4 tunneling
> technologies and running IGPs across them?
>
> andy
>
> -----Original Message-----
> From: alsontra@hotmail.com [mailto:alsontra@hotmail.com]
> Sent: Tuesday, December 14, 2004 7:49 PM
> To: 'Group Study'
> Subject: IPV6 Recursive Routing - ATM FRAME ISDN?
>
>
> All
>
> When IPv6 is configured on a frame-relay interface the address is
> recursively resolved to the local-link address of the serial interface.
> I'm finding that it's almost always necessary to map the local link
> address. Is this the case with all media requiring L2 resolution?
>
> How does ATM handle this type of behavior?
>
> TIA
> Alsontra
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