""Chris Headings"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > We are an ISP in So. Cal. We are gearing up to open other offices in > bewteen Arizona and Ca... > > We are trying to decide what would be the best way of intergrating our ISP > network...like... > > Should we just continue to use our one ASN and have all traffic come back to > the Global NOC, or should get new ASN's for each location???
Philip Smith's Multihoming NANOG presentation covers disconnected backbones and ASN usage. > Should we be using IS-IS, IBGP/EBGP, OSPF as the protocol to link all remote > locations??? Yes. If you can afford it (and I can't see why you wouldn't be able to), you should have all routers take part in IBGP. Doesn't matter about the IGP, some people prefer IS-IS, and others prefer OSPF. GlobalCrossing and AboveNet (and probably other ISP's) had to move to IS-IS eventually, and migration is terrible. If you have the knowledge or time to invest in IS-IS, I would suggest looking into that as an option before your network grows too large. Fortunately, there are a lot of really good resources out there today (for both IS-IS and OSPF, actually ;> ). > Obviously cost in an issue, but throwing cost out the door, what is the > ideal way of linking ALL offices, using a good level of redundancy and great > preformance... Metro Ethernet and wavelength services make purchasing distance bandwidth a lot easier. Co-location has also come a long way, making transit and peering very easy and cost effective. You are no longer being forced to connect into some strange, unknown remote POP via costly (and difficult to provision) SONET circuits and router interfaces. Look into your Exchange Points and Metro Providers (CLEC's for fiber and optical wavelengths) possibilities. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=43899&t=43836 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
