08-04-2016 12:17 AM
I checked our routers and I run "show route" command it has a one default route to ISPs but I run "show route all" command it has 50000 routes. Is it a big problem for ICX 7750's CPU. If it is a big problem, what suggestion for us? We dont want to buy routers and people dont suggest to use Firewall for BGP.
Thanks for reply and Best Regards
08-04-2016 01:38 AM
If these routes are coming from the same ISP and E-BGP that will also send you a default route and there is no different next_hop_address, you could kindly ask for suppression of these 50k routes. Additionally, you could install a BGP prefix filter yourself, that will block all routes except the default one.
The ICX data sheet is suggesting that the maximum routes of 122k BGP routes work with shared memory. Therefore running with 50k BGP routes COULD be fine, but also COULD limit your ability e.g. to install large filter lists or to use other router protocols that depend on the same shared memory.
I do not think that the CPU will be a factor. With 50k BGP routes, there won't be so many updates or recalculation.
08-04-2016 01:47 AM
The max BGP routes that Joerg mentions is the FIB (hardware programmed for forwarding). In terms of RIB the ICX should be OK up to about 1M routes. This is the number of non-unique routes that the BGP process can deal with. So the ICX should be able to process 50k BGP routes without too much of a problem, but it's wise to be cautious.
08-04-2016 01:59 AM
Thank you for informations. Yes, routes are coming from the same ISP and i will ask them to send us only default route. it will be good for us. And we wont use these switch fonly BGP routing. Also I ask another question, Our ISPs want to allow asymmetric traffic for L3 device. ICX 7750 series could it.