The delay part of the EIGRP composite metric is not measured. It's based on the type of interface. Each type of interface has a default value. You can change it, although this is risky and not recommended.
Because EIGRP is a distance-vector protocol, the router sends route updates that list networks. For each network, the router states the different parts of the composite metric: 1) The delay to get to the network, which is a cumulation of all interface delays. 2) The bandwidth to that network, which is the minimum bandwidth for all interfaces. 3) Reliability which is not used by default, but you can configure the router to use it. If used, the reliability is measured and represents how much of the bandwidth to the network is in use. 4) Load which is not used by default, but you can configure the router to use it. If used, the load is measured and represents the fraction of packets that arrive at the network undamaged. The router also sends the following info, which is not part of the metric, but useful for other routers to know: 1) MTU is the maximum packet size that can be sent along the entire path without fragmentation. (That is, it is the minimum of the MTUs of all the networks involved in the path.) 2) The hop count is simply the number of routers that a packet will have to go through to get to the destination. 3) Next hop is the address of the router to use to get to the destination, which is usually the router sending the update. Priscilla At 05:15 PM 2/20/02, Yatou Wu wrote: >Hi, > >In EIGRP, the delay metric is taken as configured in the interface of the >router by the administrator, by default, or by measurement? > >when the router calculates the metric, it needs to know the minimum >bandwidth along the path, and also the delay along the path. how can the >router pass the infor around? pass the total delay along the path, or delay >of every link? > >thanks > >yatou > >_________________________________________________________________ >Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp. ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36030&t=36001 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
