MY CCIE JOURNEY

#DISTANCE EIGRP IE VOL 4.10 VOL 1 #

DISTANCE EIGRP

-> To allow the use of two administrative distances
internal and external that could be a better route
to the node , use the "distance eigrp" command in
router config mode

INTERNAL DISTANCE :

-> Administrative distance for EIGRP internal routes .
internal routes are those that are learned from
another entity with the same as .


-> The distance can be a value from 1 to 255 . the
default ad for EIGRP INTERNAL ROUTES is 90


EXTERNAL DISTANCE :

-> Administrative distance for EIGRP external routes.
external routes are those for which the best path
is learned from a neighbor external to the as .

-> The distance can be a value from 1 to 255. The
default ad for EIGRP external routes is 170

USAGE GUIDELINES :

-> An administrative distance is a rating of the trustworthiness
of a routing information source, such as an induvidual
router or a group of routers .

-> Numerically , an ad is an interger from 0 to 255 . In
general , the higher the value , the lower the trust
rating . An ad of 255 means the routing info source cannot
be trusted at all should be ignored


-> use the "distance eigrp" command if another protocol is
known to be able to provide a better route to a node than
was actually learned via external EIGRP . or if some
internal routes should really be preffered by EIGRP