RE: How Many Routing Tables
Just as a follow-up question: Can somebody tell me how many route entries there are in edge and core routers nowadays? Route entries = local routes + BGP acquired routes. For the latter, the current value is about 78,000, according to the Telstra Internet BGP table maintained by Geoff Houston at http://www.telstra.net/ops/bgptable.html.
Re: How Many Routing Tables
Core routers normally have the full routing table. A router in the access layer should only have 2 paths to the distribution layer. It depends what you're doing. We try to aggregate routes at the distribution layer. eg. when you're dialing into an ISP, you want one path to the core and be able to reach everything from there (internet, server,...) The size of a routing table depends on how big you're network is. For a NAP or a core router running BGP, you'll find about 59'000 network entries and 120'000 paths (internet routing table). Damjan Nguyen Tuong Long Le [EMAIL PROTECTED] on 28.03.2000 11:05:28 To: [EMAIL PROTECTED] cc: Subject: Re: How Many Routing Tables Just as a follow-up question: Can somebody tell me how many route entries there are in edge and core routers nowadays? Thanks, -- long The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.
How Many Routing Tables
Dear Friends, This may be a silly question but I never found a clear answer form a book or a standard. A router is running BGP4, OSPF and RIP at the same time. How many routing tables(or forwarding tables) this router has? I think there should be only one table produced by all the protocols and used by the router to route every packet through the router, but I am not sure. Can somebody help get an answer ? Thank you very much David
Re: How Many Routing Tables
I think it may actually have 5 one for each protocal Plus the Static. BTW whats the CPU time on that thing like? -jeremyy On Thu, 23 Mar 2000, David Wang wrote: Dear Friends, This may be a silly question but I never found a clear answer form a book or a standard. A router is running BGP4, OSPF and RIP at the same time. How many routing tables(or forwarding tables) this router has? I think there should be only one table produced by all the protocols and used by the router to route every packet through the router, but I am not sure. Can somebody help get an answer ? Thank you very much David
Re: How Many Routing Tables
David, The router has only one routing table which use to propagate the best route to another routers base on adminstrative distance when you are running several routing protocols for the same networks. Regards. Hugo On Thu, 23 Mar 2000, David Wang wrote: Dear Friends, This may be a silly question but I never found a clear answer form a book or a standard. A router is running BGP4, OSPF and RIP at the same time. How many routing tables(or forwarding tables) this router has? I think there should be only one table produced by all the protocols and used by the router to route every packet through the router, but I am not sure. Can somebody help get an answer ? Thank you very much David
Re: How Many Routing Tables
We use one routing table, but multiple forwarding tables, depending on TOS. Bob At 11:37 AM 3/23/2000 -0600, David Wang wrote: Dear Friends, This may be a silly question but I never found a clear answer form a book or a standard. A router is running BGP4, OSPF and RIP at the same time. How many routing tables(or forwarding tables) this router has? I think there should be only one table produced by all the protocols and used by the router to route every packet through the router, but I am not sure. Can somebody help get an answer ? Thank you very much David
