Overview: We have 4 external routers each has two connections to multiple ISPs using BGP4. As our traffic is mostly outbound, we used static routes to load share/balance both circuits on each router. The IGP used is OSPF.
Problem: Recently, we are experiencing network brownouts due to peering issues of our ISPs. This results to downgraded service and our customers are complaining about the slowness of our network.
Possible solution: I remember Cisco supports OER (optimized edge routing) on its IOS 12.3(8t) and later; to monitor network performance based on latency, packet drops, etc.. However, I'm not sure if that's only applicable to BGP enabled routes or it can be applied to my scenario, where I'm ignoring BGP learned paths using default static routes (0.0.0.0/0.0.0.0).
Is there someone on this forum who could help me out or clarify this thing further? I can probably build a lab with 6 core routers (fully meshed) and 2 edge routers to run OER, but I don't want to do it if my efforts will be put into waste (or simply if my application or setup is not going to be supported).
No, OER doesn't require BGP (even the prior to PIRO versions).
With default routes, what you do is have OER inject statics. However, it will only inject statics on individual boarder routers, so you need to redistribute them to the other border routers.
I have one pair of Internet connected routers running in such a configuration. I use OSPF, with a OSPF process unique to OER, to communicate the injected statics between the routers. (I also use OER with BGP [other configs], With BGP though, you can communicate the route changes within BGP.)
BTW, you might want to review the Cisco papers and examples using OER, since some of the configuration defaults are a bit slow to respond.
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...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.