tag:blogger.com,1999:blog-6193417800921617897.post5521543792944969203..comments2023-09-07T04:03:14.584-07:00Comments on CCIE TO BE: Renumbering IPv6 with ease via ipv6 general-prefixdeadhead blueshttp://www.blogger.com/profile/10566569168999502387noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-6193417800921617897.post-60197680964926552832009-01-23T18:44:00.000-08:002009-01-23T18:44:00.000-08:00Thanks for the comment! I wasn't exactly sure how ...Thanks for the comment! I wasn't exactly sure how to interpret the command after reading the configuration guide but your explanation certainly helps.deadhead blueshttps://www.blogger.com/profile/10566569168999502387noreply@blogger.comtag:blogger.com,1999:blog-6193417800921617897.post-21259061804413012702009-01-23T18:21:00.000-08:002009-01-23T18:21:00.000-08:00The idea behind general prefix is to allow you to ...The idea behind general prefix is to allow you to configure an IPv6 address or prefix from two pieces of information. One part from the general prefix command and one given in the "ipv6 address", ACL or other command requiring an IPv6 address or prefix.<BR/><BR/>The combination of the two should in the case of an address result in 128 bits. Your example shouldn't parse:<BR/><BR/>R5(config-if)#ipv6 address TEST 2001:5::/48 eui-64<BR/><BR/>As you get 48 bits from the general prefix "TEST", then provide another 48 bits in the 2001 prefix plus 64 bits in the EUI-64.<BR/><BR/>The correct command should be:<BR/>ipv6 address TEST ::/64 eui-64<BR/><BR/>Which is 48 + 12 (::) + 64.<BR/><BR/>This mechanism would have been a great help for renumbering if all commands requiring prefix or addresses were supported, unfortunately only a couple are.Poohhttps://www.blogger.com/profile/00585128374685534902noreply@blogger.com