From: ccie2b@xxxxxxx
Date: Tue Jan 16 2001 - 22:58:35 GMT-3
It's that last statement that I need info on...the part about the
implications on redistribution...
thanks!
Devinator
ccie2b@usa.net
> RIP and IGRP route based upon the first 3 bits of the first octet of the ip
> address in binary and do not use a subnet mask to route packets. Class A =
> 010 (1-126 in decimal) Class B = 101 (128-191 in decimal) and Class C = 110
> (192-223 in decimal).
> As you know the default masks are A=255.0.0.0 B=255.255.0.0 C=255.255.255.0
> Whereas OSPF, BGP, EIGRP, IS-IS and RIPv2 can use VLSM (variable length
> subnet masks) thereby routing classlessly. These protocols use the mask
> information to route the packets.
> I don't know if this is what you wanted explained or whether I have
> explained it well enough but it certainly has major implications on route
> redistribution between classless and classful protocols.
> Gary
> ----- Original Message -----
> From: <ccie2b@usa.net>
> To: <ccielab@groupstudy.com>
> Sent: Tuesday, January 16, 2001 2:01 PM
> Subject: Re[2]: aggregate addresses and redistribution
>> Familiar with most issues, but this one keeps eluding me for some
>> reason...never had anyone explain it...and yes, 2 weeks and
>> closing...need help, not criticism...
>>
>> Devinator
>>
>>
>>
>> > You are walking into the lab in 2.5 weeks and you are unfamiliar with
>> > classful versus classless issues?
>>
>> > -----Original Message-----
>> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
>> > ccie2b@usa.net
>> > Sent: Monday, January 15, 2001 7:37 PM
>> > To: ccielab@groupstudy.com
>> > Subject: aggregate addresses and redistribution
>>
>> > I keep hearing about having OSPF and igrp (or rip) having to have
>> > matching masks or something. I don't understand what this is, applies
>> > to, etc. Can someone enlighten me in layman's terms as to this
>> > mask-matching thing?
>>
>> > Thanks ALOT,
>>
>> > Devinator
>> > ccie2b@usa.net
>>
>>
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