[c-nsp] IPv6 domain reply Cisco 6509 IPv4 address

Devon True devon at noved.org
Thu Aug 16 11:39:16 EDT 2012

On 16-Aug-12 9:41 AM, Chris Lane wrote:
> We do not run IPv6 currently from this site, ipv6 is not enabled on
> box. when i ping google.com i get the following response. ping
> google.com Translating "google.com"...domain server (
> [OK]
> Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to
> 2001:4860:4001:800::100E, timeout is 2 seconds:
> % No valid source address for destination
> Rev is: s72033-advipservicesk9_wan-mz.122-33.SXH7.bin and also for
> further IPV6 analysis: sh ipv6 int LI-Null0 is up, line protocol is
> up IPv6 is enabled, link-local address is FE80::218:74FF:FE16:D180 No
> global unicast address is configured Joined group address(es): MTU is
> 1500 bytes ICMP error messages limited to one every 100 milliseconds 
> ICMP redirects are enabled ND DAD is not supported ND reachable time
> is 30000 milliseconds
> Ran this by a friend yesterday who also found this strange behavior
> and at quick glance couldn't find any bugs related to rev.
> Just wondering if anyone else sees this behavior?

I see this on our lab 6500 running 12.2(33)SXI5 with no ipv6 configured.


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