Worked as expected for me: Cat3(config)#do sh int f0/3 | i bia Hardware is Fast Ethernet, address is 0019.060c.6143 (bia 0019.060c.6143) Cat3(config)#int f0/3 Cat3(config-if)#no swi Cat3(config-if)#ipv6 add auto Cat3(config-if)#do sh ipv6 int f0/3 FastEthernet0/3 is administratively down, line protocol is down IPv6 is tentative, link-local address is FE80::219:6FF:FE0C:6143 [TEN]
What IOS are you running? -- Marko Milivojevic - CCIE #18427 (SP R&S) Senior CCIE Instructor / Managing Partner - IPexpert On Fri, May 31, 2013 at 1:24 PM, <[email protected]> wrote: > Hi, > > I'm trying to get a handle on the Modified EUI-64 (IPv6 stateless > autoconfig) > > Switch#sh int fa0/3 > FastEthernet0/3 is down, line protocol is down (notconnect) > Hardware is Fast Ethernet, address is 001b.2ba2.9584 (bia 001b.2ba2.9584) > > Following the rules: > 1.Inverse the 7th most bit: 00 = 00000010 = 021B.2BA2.9584 > 2.Add FF FE to the middle: 021B.2BFF.FEA2.9584 > 3.Add FE80 to the beginning: FF80:021B:2BFF:FEA2:9584 > > Switch#conf t > Enter configuration commands, one per line. End with CNTL/Z. > Switch(config)#int fa0/3 > Switch(config-if)#no switch > Switch(config-if)#ipv6 add auto > Switch(config-if)#do sh ipv6 int br > Vlan1 [up/down] > unassigned > FastEthernet0/1 [up/up] > FE80::21B:2BFF:FEA2:95C2 > FastEthernet0/2 [down/down] > FE80::1 > FastEthernet0/3 [down/down] > FE80::21B:2BFF:FEA2:95C3 > FastEthernet0/4 [down/down] > unassigned > FastEthernet0/5 [down/down] > unassigned > FastEthernet0/6 [down/down] > unassigned > FastEthernet0/7 [down/down] > unassigned > FastEthernet0/8 [down/down] > unassigned > GigabitEthernet0/1 [down/down] > unassigned > > Switch(config-if)#do sh int fa0/3 > FastEthernet0/3 is down, line protocol is down (notconnect) > Hardware is Fast Ethernet, address is 001b.2ba2.95c3 (bia 001b.2ba2.95c3) > > > I don't have time to read all the documentation right now on why it's > doing this to the end of the address. Does anyone know off the top of their > head why the address would change from 84 to c3 (at the end of the address)? > > Thanks in advance > ______________________________**_________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/**mailman/listinfo/ccie_rs<http://onlinestudylist.com/mailman/listinfo/ccie_rs> > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
