Hi!I am trying to setup my 1812 with 15.1(4)M to do 6to4 tunneling through the anycast address 192.88.99.1 but can't get it working.Config extract:ipv6 general-prefix my-prefix 6to4 FastEthernet0ipv6 unicast-routingipv6 cef!interface Tunnel0 no ip ad...
I don't quite understand the way IPv6 RS and RA works. I know that Neighbor Discovery Protocol (ND) is the replacement in the IPv6 world for ARP, I just don't understand how it works. So from what I understand, when you enable ipv6 on an interface, i...
I have assigned three addresses on a loopback interface I want to use for management purposes (ie "logging source-interface Lo 0"). I have assigned a "primary" routable address from the 2604:: space, a backup address from 2001:: and a unique local a...
For HSRP and IPv6, I'm toying with the idea of using the same link local on all segments along with static Globals.FE80::1 HSRPFE80::2 First routerFE80::3 Second router2001:db8::1/64 HSRP2001:db8::2/64 First Router2001:db8::3/64 Second RouterOn my 45...
For those of you that allow your router transits to use eui-64, how to you keep track of the IPs in DNS for reverse resolution?And how do you track needed changes to DNS after an RMA that will cause the eui-64'd interface IPs to change?
We've found that we have to set static link local IPs when two routers might peer over multiple VLAN interfaces.The issue is that the routers, 6500s with sup720s, utilize the same autoconfig'd link local address on each VLAN interface. EIGRP IPv6 r...
I'm thinking about our transition from IPv4 to IPv6. Today, we have an IPv4 IPSEC tunnel to each of our customer sites (now over 300 locations). We have carved a 32-address subnet (a /27) out of the IPv4 10.*.*.* private space for each customer. E...
I am investigating mechanisms to allow the migration of an IPv4/MPLS network, carrying VPNs, to use IPv6. I have a core of P routers, running IOS 12.4, connecting to PE routers, also running 12.4. I am using OSPF as the IGP, with iBGP in the core....
Hi,I'm trying to implement ipv6 dhcp relay agent using ISR 1841 as the relay agent.both client and server are ISC's implementation.The problem i'm facing is that eventough the DHCP Server sends the prefix delegation option to the client the ISR 1841 ...
Hi,We want to enable the 6PE feature in the 7609 router.But we couldn’t configure send-label command under [address-family ipv6]. We are using ios version s222-advipservicesk9_wan-mz.122-18.SXF12a.bin. Does this version supports the above feature? if...
Hi!I've encountered a problem trying to configure something like this in a Sup720 with IOS 12.2(33)SXI2a:router(config-if)#ipv6 address 2001:DB8:CAFE:CAFE::1/56router(config-if)#ipv6 nd prefix 2001:DB8:CAFE:CAFE::/64so the idea is to have a routed /5...
I know that this isn't a Cisco specific question, but I'm curious as to how I would go about reserving a block of IPv6 addresses for my company. I have seen some people suggest on other forums that we're supposed to use the ISP supplied addresses. ...
Hi All, (Apologies if this question appears twice. Apparently I had an interface problem)I'm finishing up my studies on the IPv6 portion of the CCNA material, and my book seems to completly ignore the fact that 6to4 addresses seem to look different t...
with Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn about dual IPv6 and IPv6 stacked environment with Cisco subject matter expert Phil Remaker who can also explain typical failure modes in IPv6 tra...
