pre-merge testing 

Always

For Primary Interface, the ipv6 is with 128 prefix as well.
For node host-addresses annotation, "fd2e:6f44:5dd8:c956::17/128" is with 128 prefix as well.
Annotations:        k8s.ovn.org/host-addresses:
                      ["192.168.111.23/24","192.168.111.4/32","fd00:1101::cf40:f9ad:7679:e00a/128","fd2e:6f44:5dd8:c956::17/128","fd2e:6f44:5dd8:c956::4/128"]

But for k8s.ovn.org/node-primary-ifaddr, we can see the prefix is 120
# oc describe node worker-0.sriov.openshift-qe.sdn.com | grep primary
                    k8s.ovn.org/node-primary-ifaddr: {"ipv4":"192.168.111.23/24","ipv6":"fd2e:6f44:5dd8:c956::17/120"}

sh-4.4# ip a show br-ex
6: br-ex: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether 00:32:ca:4e:a8:b9 brd ff:ff:ff:ff:ff:ff
    inet 192.168.111.23/24 brd 192.168.111.255 scope global dynamic noprefixroute br-ex
       valid_lft 2559sec preferred_lft 2559sec
    inet 169.254.169.2/29 brd 169.254.169.7 scope global br-ex
       valid_lft forever preferred_lft forever
    inet 192.168.111.4/32 scope global br-ex:vip
       valid_lft forever preferred_lft forever
    inet6 fd2e:6f44:5dd8:c956::4/128 scope global nodad deprecated 
       valid_lft forever preferred_lft 0sec
    inet6 fd69::2/125 scope global nodad 
       valid_lft forever preferred_lft forever
    inet6 fd2e:6f44:5dd8:c956::17/128 scope global dynamic noprefixroute 
       valid_lft 2414sec preferred_lft 2414sec
    inet6 fe80::232:caff:fe4e:a8b9/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

For primary interface, egressIP can be assigned to egress node
oc get egressip
NAME         EGRESSIPS                 ASSIGNED NODE                         ASSIGNED EGRESSIPS
egressip-1   fd2e:6f44:5dd8:c956::20   worker-0.sriov.openshift-qe.sdn.com   fd2e:6f44:5dd8:c956::20

However, egressIP can NOT be assigned to egress node for secondary interface
oc get egressip
NAME         EGRESSIPS                        ASSIGNED NODE   ASSIGNED EGRESSIPS
egressip-1   fd00:1101::cf40:f9ad:7679:e00b                   
# oc get event | grep egressip
79s         Warning   NoMatchingNodeFound                          egressip/egressip-1                        No matching nodes found, which can host any of the egress IPs: [fd00:1101::cf40:f9ad:7679:e00b] for object EgressIP: egressip-1

2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:32:ca:4e:a8:b7 brd ff:ff:ff:ff:ff:ff
    inet6 fd00:1101::cf40:f9ad:7679:e00a/128 scope global dynamic noprefixroute 
       valid_lft 80792sec preferred_lft 80792sec
    inet6 fe80::232:caff:fe4e:a8b7/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

In a conclusion, both primary interface and secondary interface get the IPv6 address from dhcpv6 and if we use `ip a` to check, both of them have 128 prefix.  But egressIP works for primary interface not secondary interface

EgressIP should work for secondary interface as primary interface for dhcpv6 assigned IP address.