Doesn't look like there is

paul_shiner · ‎09-24-2015

Hi All,

I was wondering if someone could answer whether this is normal? Got a VPN client that has this:

Ethernet adapter Local Area Connection 3:

Connection-specific DNS Suffix . : actian.com
Description . . . . . . . . . . . : Cisco AnyConnect Secure Mobility Client Virtual Miniport Adapter for Windows x64
Physical Address. . . . . . . . . : 00-XX-9A-3C-7A-XX
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::218e:788f:4221:286a%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::2439:ccc3:2aad:5be5%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::2655:9b8d:9e78:95a1%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::26ed:3bf9:6888:bf79%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::26ef:5c02:2c9c:2fda%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::2847:4134:7c3d:b1be%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::2a1f:645f:41d1:2b41%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::2a2e:de31:6782:491d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::2b9e:c81b:3443:6672%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::2cd3:88e9:b76e:d639%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::2d14:a03b:b61e:29d5%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::2d4c:7b2a:3bc6:4df1%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::2ef9:758c:5449:9692%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::30e9:3d03:9190:5c9d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::335d:5890:3004:5c89%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::3402:3a00:77b3:4279%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::349d:39c0:222b:324a%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::3513:c981:300b:3115%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::372c:3f9f:2759:9775%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::3881:5926:824a:3cad%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::3912:d31c:6ae5:517d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::3983:9f51:9385:9995%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::39e0:377c:631e:a7a6%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::3f8b:99f1:ad97:8519%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::3fcd:603f:204a:d809%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::42ad:5950:3aad:d729%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::43a5:bce3:4a54:2f29%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::461d:3295:484e:4a3d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::4655:31fc:896e:67c1%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::4762:3c7f:66eb:434e%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::479d:5299:96b4:9c71%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::4a6c:be55:2a10:5919%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::4bd5:66e6:3930:7b3d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::4e31:3c09:33f8:aa75%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::4f89:4022:c703:6f19%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::50d2:cba0:55d1:3881%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::523f:7a30:a2d2:2d86%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::524e:7c1b:200e:a8fd%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::5ab1:2e60:56a1:8d85%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::5beb:61a5:df55:417d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::5eb2:94c1:2d1c:5da9%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::6151:96e9:3cc9:243a%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::6185:3d8a:4abb:c324%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::630b:7a77:a681:4e4a%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::634f:5d51:2fc2:5641%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::6697:578a:8630:bb45%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::67c3:556f:cc6a:3785%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::6a9e:3711:b83e:2449%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::6ada:38b8:db77:4991%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::7142:2cb1:5265:ba89%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::715f:c789:68f4:57f9%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::7431:6f95:3a35:a3e1%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::7660:c0a1:c2a4:248a%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::796f:2f6a:a0d8:7509%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::7f33:2e60:4493:6039%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::822c:49c2:7a5f:3dc9%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::8258:615a:98a0:4f2d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::8496:8751:2f6b:3095%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::8867:55f2:2a62:3a8a%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::8d44:b76f:a1c0:8539%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::8e0d:2d17:5b2e:bd29%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::8e66:ac11:6760:ae6a%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::97f8:df65:5335:20e1%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::9829:57e3:49bb:48a1%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::9ca6:d953:5115:2b9d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::9f58:56f0:d115:5571%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::a544:21a0:4ece:9a31%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::a862:7dbf:5564:78fa%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::ab42:3d04:4978:5e51%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::ab79:5d8a:46ec:d25d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::abff:3ccf:4647:d31d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::be9a:c319:9377:43a9%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::c056:4f33:523d:4649%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::c0b3:36fc:5728:889d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::c382:4186:b73b:2a55%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::c533:cfb6:6e22:8afe%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::ca17:24c7:3fea:2089%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::ce67:3096:50ce:318d%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::d60c:90bd:4316:4356%23(Preferred)
Link-local IPv6 Address . . . . . : fe80::dfb3:82bd:acd8:4d9a%23(Preferred)
IPv4 Address. . . . . . . . . . . : 10.192.x.x(Preferred)
Subnet Mask . . . . . . . . . . . : 255.0.0.0
Default Gateway . . . . . . . . . : ::
DHCPv6 IAID . . . . . . . . . . . : 318768538
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1A-33-E4-39-00-21-9B-67-7D-26
DNS Servers . . . . . . . . . . . : 10.192.x.x
10.3.x.x
NetBIOS over Tcpip. . . . . . . . : Enabled

(some info X'd out)

Why would this happen?

Any idea or pointers appreciated....

Thanks,

Paul

rvarelac · ‎09-24-2015

Hi Paul,

Is this behavior reproducible on other computers or only one ?

Is the Anyconnect tunneling IPv6 networks ?

Is the issue is only seen on this computer most likely a third party software is causing this behavior.

hope it helps

-Randy-

paul_shiner · ‎09-25-2015

Thanks for replying Randy.

I am only seeing this on one machine.

The AnyConnect is only tunneling IPv4 and the ASA itself only runs IPv4.

The client simply has IPv6 enabled on OS level so had no IPv6 addresses on main network card apart from the one link-local.

I am leaning towards agreeing that it's something iffy on this one machine causing the problem, but I really was trying to understand why it would create loads of link local addresses on the AnyConnect adapter... was wondering if anyone had seen this before.

Is this multiple link local address situation even valid? Would you ever see this many on valid and working IPv6 machine?

Cheers,

Paul

rvarelac · ‎09-25-2015

Personal , I've never seen this behavior , you can check if there is a 3rd party software on the adapter going to Network and sharing center -> Change adapter settings --> Cisco Anyconnect Secure Client connection --> right click and properties .

Happy weekend !

- Randy-

network.support · ‎09-30-2015

Doesn't look like there is any other 3rd party things. I've opened up a TAC now so will report back once I know the root cause.

Crazy amount of IPv6 link local addresses on AnyConnect!