<div dir="ltr"><div><div><div><div><div><div><div>I am trying to convert some VMWARE hosted test servers (fedora 18 & Win7) (on Cisco UCS blade) to use IPV6.<br>They are in one part of our internal network on a L2 VLAN hosted on Nexus 5K & 7K switches terminating on a 6500 with a dual stacked L3 interface (not an SVI). <br>
The end result is that the servers are several L2 hops away from the routed 6500 interface.<br><br></div>The IPV4 connectivity works great!<br><br>Using show ipv6 neighbors: On the 6500 I only see the link-local address of the neighbor servers.<br>
<span style="font-family:courier new,monospace"><br>FE80::250:56FF:FE11:2233 57 0050.5611.2233 STALE Gi1/24<br>FE80::7D12:8F6:81C5:5F9A 1 000c.298f.90cb STALE Gi1/24<br>FE80::607A:39E2:A4E3:128D 125 000c.298f.90c1 STALE Gi1/24<br>
FE80::20C:29FF:FECF:BE5D 49 000c.29cf.be5d STALE Gi1/24</span><br><br></div>On the Win7 server VM I see: (netsh interface ipv6 neigh)<br><span style="font-family:courier new,monospace"><br>Internet Address Physical Address Type<br>
---------------------------- ----------------- -----------<br>2606:2b00:0:a00::1 Unreachable Unreachable <== router on 6500<br>2606:2b00:0:a00::beef 00-0c-29-cf-be-5d Stale <== a linux server on same VMWARE host<br>
fe80::20c:29ff:fecf:be5d 00-0c-29-cf-be-5d Stale <== a linux server on same VMWARE host<br>fe80::215:c7ff:fec5:db00 00-15-c7-c5-db-00 Stale (Router) <== router on 6500</span><br><br><br></div>
Its sees both the 6500 router interface's link-local and global addresses, although the global is "unreachable".<br><br></div>From the 6500 I can ping both server's link-local address OK, but not the global address.<br>
I tried letting the server pick it's own address using <span class=""><em>SLAAC - this worked OK, so its getting RAs OK. But I can't ping those<br></em></span></div><span class=""><em>addresses either from the 6500.<br>
<br></em></span></div><div><span class=""><em>Installed wireshark on the fedora VM and it sees the router's RAs and the Win7's neighbor advertisements/solicitations.<br><br></em></span></div><em>Also noticed that when I 1st ping the VM servers link-local addresses there is a 2 second pause and then it pings OK.</em><span class=""><em> <br>
After doing this I can ping the router's link-local address from the VMs with no pause, but the ping would fail UNTIL I 1st ping from the router side.<br><br></em></span></div><span class=""><em>Is this a case of needing to configure MLD on the nexus and UCS switches? Is there anything I need to do to verify its correctly setup?<br>
</em></span><div><span class=""><em><br></em></span></div><div><span class=""><em>any help would be greatly appreciated,<br><br></em></span></div><div><span class=""><em>-Jim<br></em></span></div><div><span class=""><em><br>
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