At 12:23 AM +0000 9/27/02, Matthew Webster wrote: >I studying the CiscoPress CCNP Routing Book at the moment.
As I've always understood from the IETF: E1 metric = sum of internal costs of reaching ASBR + external cost of ASBR E2 metric = external cost of ASBR. > There appears to >be a contradiction on page 294 and 295. on page 294: the path to another AS >can be calculated in one of two ways. The second way (E2) states that the >cost of the path to the ASBR is all that is considered in the equation. If the cost of the ASBRs is equal, you get the effect of this as the E1 metric, but this is not implicit in the protocol. >However in table 6-2 on p.295 it states that LSA type 5, in relatino to E2 >"dopes not compute the internal cost - it just reports the external cost to >eh remote destination". This seems to be the opposite of the previosu >statement. This is the E2 metric. > >Can any advise which way round it is (although I think it is the cost to the >ASBR, and not the cost from the ASBR to the remote destination). > >Cheers, >Matthew. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54320&t=54293 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
