North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: Peering best practices advice needed.
Hello. Three options. 1. Acquire a second ASN, and announce each site's /19 from a different asn. 2. Announce each locations /19 from it's respective location, using the same asn. Use the cisco BGP command Allow-as-in to permit each AS to hear the remote site's network advertisement. 3. If the remote site will not be multihomed, ask their ISP to announce the /19 for you. My gut says that if you are advertising a block in the territory of another RIR, your irr entries will need to be correct to save filtering issues. Good Luck, Ejay > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Rolo Tomassi > Sent: Wednesday, December 08, 2004 11:04 AM > To: [email protected] > Subject: Peering best practices advice needed. > > > Hi all, > > Please forgive the simplistic nature of the query.. > > Basically my company is multi-homed with 2 different > providers in the UK, > and advertising a /18. Now some colleaguges in another part > of the world > want to break that /18 into two /19's and advertise one /19 > and we advertise > the other. This is fine, however we are NOT running IBGP in the core, > therefore the UK customers in the /19 will not be able to > reach the other > /19 as there would be a loop detected through EBGP. > > Now someone mentioned that we could use AS-LOOP-IN feature which will > overcome this problem and allow us to route to each other via > EBGP. I really > think this is a bad idea but until we get an internal link - > I dont see a > way forward. So... anyone doing this currently in their > network or have any > "best practices" way round this. I want our company to be > good Netizens but > still be able to pass traffic between the 2 /19's. > > Any help would be greatly appreciated. > > Rolo ! > > ____________________________________________________________ _____ > Stay in touch with absent friends - get MSN Messenger > http://www.msn.co.uk/messenger
|