We have two internet service providers ISP1 and ISP2. We have two 1841 series routers on which these links are terminated. Now we are in phase of purchasing "IP address Pool" which is routeable by all IPS's so that it will be routed by both the ISPs and our rosources will be available all the time even if ISP1 or ISP2 link is down. Here is the problem , ISP 1 and ISP 2 are asking us to RUN BGP on our routers. We have 1841 series routers and running BGP on it will be too high expection. Is it possible to run a very samll / limited version of BPG ( similar to OSPF stub area ) on this router ( 128 mb dram , and Adv. Secruity. Enterprise version of IOS is available on router ). What I feel is that can we have a simple static routing done for the same pool from both the service providers and we will use interface tracking to send the traffic either to ISP1 or ISP2.
Purchasing 3845 or 3825 series router will be too costly.
It will be very much possible to run the BGP at the LAST MILE with the Current set of Router facility you have: The Solution can be implemented with Mimimum Resource Utilization of "Router" by controlling the Inbound / Outbound Advertisement:
Running BGP on both 1841 with both providers is the optimum case, because this will allow you to control your traffic over internet, but other solutions are also applicable.
Regardless if you have your own AS# or your ISPs will accept peering via private AS, sure you can run BGP with both ISPs with limited resources utilization,
and this can be done by control the inbound and output advertisements.
Inbound: Only allow default-route to be received over both sessions (To save memory Ask your ISPs to make it for you from their side)
Outbound: Advertise your own IP address space.
Downstream / Upstream traffic:
Internally you can use your internal IGP or even static routes to load-balance or load-share or even send your upload over one line, regarding downstream you can use one ISP as primary and the second one as backup or load-balance over both links.
As i said above other solutions are also applicable, for example you can ask your ISP's to advertise your Public Address space on behave you (Make sure your IP address are PA not PI in RIP or your region RIR) but in this case static routes or any other dynamic protocol should be used between you and both service providers, also in this case the links should be use in Main/Backup fashion because downstream load-balance is possible but not easy in this solution (Inconsistent AS).
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...