Velocity Reviews - Computer Hardware Reviews

Velocity Reviews > Newsgroups > Computing > Cisco > Clarify Route once/Switch many

Thread Tools

Clarify Route once/Switch many

Nathan Harmon
Posts: n/a
Can someone clarify the concept of route once, switch many? Does that
mean within a local area network you should be two hops at most between
any other system? I'm having a hard time seeing how this works in large
networks with separate access, distribution, and core layers. It seems
like the distribution and core layers would all communicate on a
separate VLAN to pass data, thus creating more logical hops.

Or am I over thinking this?

Reply With Quote
Posts: n/a
The basic issue has to due with the delay imposed by a router on packet
forwarding - if you can minimize the number of times that datagram
headers have to be parsed in order to forward them to the appropriate
end destination, the result will be a reduction in the total system
delay and an improvement in throughput.

This is especially useful in a packet train or data flow between two
peers -- determine the route, then disseminate the path info to the
(layer-2) switches so that minimal processing occurs, minimizing delay.


Brad Reese
2007 Cisco Salary Rates

Reply With Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
What is the default precedence: local-route, static-route,OSPF-route? Cisco 9 08-07-2008 05:42 PM
pix no route to host, but there is a route Karnov Cisco 3 02-02-2006 09:03 PM
Can netwrok run static route and dynamic route the same time? Bruce Cao Cisco 3 12-06-2005 02:15 AM
route-map question (how to policy route for all destinations except few subnets?) Cisco 1 08-13-2005 08:52 PM
Using route-map to route packets coming from different networks. AM Cisco 3 07-25-2005 07:12 AM