ramesh.chandra at airtel dot in wrote: > Hi Mark, agree, there is lot of improvement in SW > coding. Cisco has also improved in XOR release. However, > number of routers running XOR is very low. Cisco as > market leader runs same process in IOS used in most of > routers at present. Same is with other vendors and > impact possibly may be different. > There is no intention of summarizing routers available in > different AS. The improvements are I speak about are not unique to IOS XR, but to IOS and IOS XE as well. That said, the BGP Scanner is a feature unique to Cisco. Other vendors such as don't necessarily implement next-hop tracking the same way. However, it is conceivable that any network running an IOS- based router that's implementing IPv6 seriously today is supporting a recent IOS release that has done away with the old BGP Scanner. This likelihood is significantly increased if an ISP plans to support 4-byte ASN's natively, but I digress. While the next-hop tracking discussion is slightly academic owing to the fact that it's not possible to know what code the majority of the Internet is running, I don't think it's reasonable to use that as an argument to promote this proposal either. Mark.
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