Mark well... i'll sized an ASR1K6 with dual RP2 with 16GB of ram (damn there are the most expensive DDR3 memory available - 11000 us$ for just 8GB), and as i get feedback from Cisco Support, there are enought to handle 4Million IPv4 prefixes.
Hope that was true! i really hope that will enought because i put the whole memory the RP2 can handle. On Thu, Jan 2, 2014 at 3:03 PM, marc abel <[email protected]> wrote: > Slightly OT, but has anyone had any memory issues with ASR 1K's? I've run > into memory issues on two different one taking two full BGP feeds. One > would think that these size routers should be able to handle 2 full feeds > as that seems like exactly what they are designed for. > > > On Thu, Jan 2, 2014 at 11:56 AM, Edgar Mauricio Diaz Orellana < > [email protected]> wrote: > >> Greetings Ryan. >> >> there is a memory sizing table on the BGP Design and Implementation Book, >> As my mind recalls, as much memory as you can take on your router is >> better, but my worries are the CPU to handle all the BGP Table. >> >> did your ISP put limit on the prefixes lenght push to your peer ?, did >> you think put the prefix limit on your side ? >> >> a good reading on that is "ISP Essentials" and the "BGP Design and >> Implementation" both from CiscoPress >> >> Best Regards. >> >> >> On Thu, Jan 2, 2014 at 1:12 PM, marc abel <[email protected]> wrote: >> >>> You do not need BGP soft-reconfiguration as of IOS 12.0 so that should >>> save >>> you some memory. >>> >>> >>> http://www.cisco.com/en/US/products/ps6599/products_data_sheet09186a0080087b3a.html >>> >>> Previously, in order to perform a soft reset for inbound routing table >>> updates, the neighbor soft-reconfiguration command directed the Cisco IOS >>> software in the local BGP router to store all received (inbound) routing >>> policy updates without modification. This method is memory-intensive and >>> not recommended unless absolutely necessary. (Outbound updates have never >>> required the extra memory and are not affected by this feature.) >>> >>> With this software release, the BGP Soft Reset Enhancement feature >>> provides >>> automatic support for dynamic soft reset of inbound BGP routing table >>> updates that is not dependent upon stored routing table update >>> information. >>> The new method requires no preconfiguration (as with the neighbor >>> soft-reconfiguration command) and requires much less memory than the >>> previous soft reset method for inbound routing table updates. >>> >>> >>> On Thu, Jan 2, 2014 at 9:51 AM, Ryan Jensen <[email protected]> wrote: >>> >>> > Morning! >>> > I have an OT question... >>> > I have two 40mbps internet connections from the same ISP today, each >>> one >>> > runs into a 2921 router. I receive a default route via eBGP with ISP >>> and >>> > the two routers peer via iBGP with each other. I'm going to be >>> dropping one >>> > internet connection soon and picking up a second ISP, same bandwidth. >>> We're >>> > just doing this to diversify. >>> > Question is: Would the 2921s have enough resources to accept full >>> internet >>> > tables from each ISP? >>> > The way I look at it, each router would store the BGP table from the >>> ISP, >>> > and also store the table from its iBGP peer... with >>> soft-reconfiguration >>> > enabled, It then stores a second copy of each peer's updates. Basically >>> > requiring the router to store the entire internet BGP table 4 times... >>> Am I >>> > looking at this correctly? >>> > >>> > I know my current ISP has an option for them to advertise their >>> originated >>> > routes (core routes) and a default, so that would significantly >>> decrease >>> > the update size from that peer, but I don't know if my incoming ISP has >>> > that option. >>> > >>> > Routers are default hardware spec, 1g RAM, 256mb Flash >>> > IOS 15.2(4)M3 >>> > >>> > Thoughts?? >>> > _______________________________________________ >>> > Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos >>> :: >>> > >>> > iPexpert on YouTube: www.youtube.com/ipexpertinc >>> > >>> >>> >>> >>> -- >>> Marc Abel >>> CCIE #35470 >>> (Routing and Switching) >>> _______________________________________________ >>> Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos :: >>> >>> iPexpert on YouTube: www.youtube.com/ipexpertinc >>> >> >> >> >> -- >> >> Edgar Díaz Orellana >> CCENT/CCNA/CCDA/CCNA Security, CCNP, CCNP Security en progreso. >> Kaspersky Administrator / Technical Specialist >> Microsoft Certified Professional. >> Celular : 09-91283087 / 09-94118996 >> skype: eorellan1969 >> >> >> > > > -- > Marc Abel > CCIE #35470 > (Routing and Switching) > -- Edgar Díaz Orellana CCENT/CCNA/CCDA/CCNA Security, CCNP, CCNP Security en progreso. Kaspersky Administrator / Technical Specialist Microsoft Certified Professional. Celular : 09-91283087 / 09-94118996 skype: eorellan1969 _______________________________________________ Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos :: iPexpert on YouTube: www.youtube.com/ipexpertinc
