ipv6 unicast-routing
no ipv6 source-route
ipv6 cef
!
interface <interface_at_TIX_switch>
 description to-TIX-switch
 ip address 196.223.5.x 255.255.255.128 
 ipv6 address 2001:43F8::y/64
 ipv6 nd suppress-ra
!
!
router bgp <asn> 
 no bgp default ipv4-unicast
 neighbor 2001:43F8::1 remote-as 33791
 ! ...
 !        
 address-family ipv6
 neighbor 2001:43F8::1 activate
 neighbor 2001:43F8::1 prefix-list to-tix-v6 out
 network <your-prefix>/32
 exit-address-family
 !
exit
! 
ipv6 prefix-list to-tix-v6 seq 5 permit <your_prefix>/32
ipv6 prefix-list to-tix-v6 seq 10 deny any

! secure telnet access
ipv6 access-list IPv6-vty-access
 !  possibly allow your own NOC
 deny ipv6 any any

line vty 0 4
 ipv6 access-class IPv6-vty-access in