What is Brocade up to here?

[sthaug at nethelp.no]

% host brocade.com
brocade.com has address 144.49.210.200
brocade.com has IPv6 address 2620:100:4:6401::20

If I try "telnet 2620:100:4:6401::20 80" I get this rather "interesting"
result (my IPv6 address is 2001:8c0:9602:1::2):

16:27:01.107632 IP6 2001:8c0:9602:1::2.14710 > 2620:100:4:6401::20.80: Flags [S], seq 148079426, win 65535, options [mss 1440,nop,wscale 3,sackOK,TS val 1218395701 ecr 0], length 0
16:27:01.289048 IP6 2620:100:4:6400::7 > 2001:8c0:9602:1::2: ICMP6, neighbor solicitation, who has 2001:8c0:9602:1::2, length 32
16:27:01.289200 IP6 2620:100:4:6400::7 > 2001:8c0:9602:1::2: ICMP6, neighbor solicitation, who has 2001:8c0:9602:1::2, length 32

Since brocade.com is around 80 ms and more than 15 router hops away, I'm
really curious about the neighbor solicitation. It is quite consistent.

(Oh yeah, I never get an answer from port 80 on the IPv6 address. But HE
takes care of things nicely, so brocade.com works in my browser.)

Anybody know what Brocade is up to here?

Steinar Haug, AS 2116