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  • IPv6 HSRP configuration

    I do not understand what this error message means. ent1-dc1(config-if)#standby 1 ipv6 2001:201:15:3e8::/64 %GigabitEthernet0/4: Warning: 2001:201:15:3E8::/64 is a Subnet Router Anycast The IOS config guide says to use `# standby 1 ipv6 autoconfig`, which does it actually mean? What's the advantage...
  • IPv6 Multicast ping

    Doing some basic IPv6 stuff in ViRL, and after configuring link local addresses I can ping the FF00::1 multicast address and get responses, but after configuring a Unique local address also on the same segment I can't ping the all hosts M/C address anymore. I'm a bit stuck as to why this happens...
  • IPv6 EIGRP route Advertisment

    Hi, I have a simple topology in which I have configure eigrp and ripng running IPv6 between two routers. When advertise the loopback ipv6 address from Router1 towards Router2 and I check the routing table I only see the network portion of the IPv6 address. Why can’t I see the entire address such...
  • OSPFv3 tie-breaker

    Sorry if this has already been answered. I've searched and searched and have not been able to find an answer, although I have a few suspects. I'm trying to understand why the path through 2.2.2.2 is selected when the path through 4.4.4.4 is the same type, LS age, cost, and metric. R3#sh ipv6...
  • CCIEv5.ts.lab1.ticket 8

    The ipv6 section of the solution is not incomplete. You have to change the ipv6 address of the virtual-template from ipv6 address autoconfig to ipv6 unnumbered GigabitEthernet1.1820. The ticket requires us to get the followirng result but 2004:172:23:20::20 is not the address of g1.1920 (auto config...
  • ATC - EIGRPv6 Default Routing

    FYI For anyone interested the workbook states, " The second technique will summarize all routes, because the default route encompasses all of them, and there is no leak-map in EGRPv6 yet to “unsuppress” certain prefixes. " Well I was playing around and there is a leak-map command...
  • Re: ospfv3 cost dynamic

    I found RFC 5614 and 7038 are most likely unrelated. I did find more documentation of the dynamic cost feature here . This configuration guide provides clarity to the formula found in the OSPF configuration guide (MDR is maximum data rate, CDR is current data rate, etc.). I also found that doing "show...
  • IPV6 Questions -1

    1. /X in ipv6 represents subnetmask or no of bits for networks .if it represnets subnetmask so can we say we have 128 bits of subnet mask fro ipv6 ? 2. whats the difference b/w following 2 commands Ipv6 add 2001:0:0:1::1/64 Or ipv6 add Maybeccie 2001:0:0:1::1/64 Second command where we can use and why...
  • IPv6 Queries

    Hello Guys I have 2 queries related to Ipv6 and please help me on these. 1) We know that we can assign 2 or more globally routable IPv6 addresses to a particular Interface on Router but which one of these addresses would be used as Source address for any particular traffic. 2) In DHCPv4, we know that...
  • IPv6 EUI-64 Address Question

    In the IPv6 video of INE's CCIE R&S written prep, they convert the MAC 1234.5678.9012 to EUI-64 format of 1034:56FF:FE78:9012. What am I missing? The insertion of FFFE is clear and easy enough. Flipping the UL bit (7th from the left) is clear enough, but I end up with the following 1. Insert...
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