IPV6 to link local or not link local , that is the question!

From: stephen skinner (stephenski@gmail.com)
Date: Sun Oct 23 2005 - 14:42:05 GMT-3


Chaps,
 i am trying to collect a list of when a link local IPV6 mapping should be
done .
 int s0/0 = NO
int s0/0.1 point-to-point NO
int s0/0.1 point-to-multipoint YES
 int s0/0
ip ospf network point-to-point = NO
int s0/0.1 point-to-point
ip ospf network non broadcast = YES
int s0/0.1 multipoint
ip ospf network non broadcast =YES
 int s0/0- s0/0.1 p2p - s0/0.1 m2m
ipv6 rip = YES
 int s0/0- s0/0.1 p2p - s0/0.1 p2m
ipv6 isis = YES
 int s0/0- s0/0.1 p2p - s0/0.1 p2m
ipv6 eigrp = yes
  i believe i`m getting a Little confused,
 In the labs that i have been doing , some have link local mappings and some
don`t ...
 I have been unable to find a proper explanation of when to map Link Local
and
more importantly when not to map Link Local on the CCO .
 several examples of ipv6 config on the CCO say that you don`t need to map
LL but further down in the config i see that LL`s are mapped .
 one explanation of link local addressing and mapping i have read said
 " a dynamic routing protocol need Link Local scope for next-hop ipv6
addressing , therefore create local link mapping`s on you serial int "
 yet i have also read that you don`t need it . ( i have also proved it by
labbing this up FR hub and spoke )
 so to my QUESTION ..
 on the LAB , do you think it is best TO map LL or NOT TO .. if you are not
given any explicit instruction`s to use LL mappings
 would anyone PLEASE care to comment
 many thanks in advance
 Steve



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