vxlan-gpe: rogue lisp bridge-domain created

[Onong Tayeng]

Upon creating a gpe network with vni 100, a rogue lisp bridge-domain got created along with the legitimate one:

root@gtw01:~# vppctl
    _______ _ _ _____ ___
 __/ __/ _ \ (_)__ | | / / _ \/ _ \
 _/ _// // / / / _ \ | |/ / ___/ ___/
 /_/ /____(_)_/\___/ |___/_/ /_/

vpp# sh int
              Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count
TwentyGigabitEthernet7/0/0 1 up 9000/0/0/0
l2_lisp_gpe100 5 up 0/0/0/0 tx packets 6
                                                                    tx bytes 496
l2_lisp_gpe1000 4 up 0/0/0/0 tx packets 77
                                                                    tx bytes 5390
lisp_gpe0 3 up 0/0/0/0
local0 0 down 0/0/0/0
tap0 2 up 9000/0/0/0 rx packets 1050029
                                                                    rx bytes 56884718
                                                                    drops 1050029
                                                                    ip6 580
tap1 6 up 9000/0/0/0 rx packets 13
                                                                    rx bytes 1102
                                                                    drops 13
                                                                    ip6 7
vpp#

vpp# sh bridge-domain
  BD-ID Index BSN Age(min) Learning U-Forwrd UU-Flood Flooding ARP-Term arp-ufwd BVI-Intf
  66000 1 0 3 on on flood on off off N/A
  65100 2 0 3 on on flood on off off N/A
vpp#

Here’s what the rogue BD contains:

vpp# sh bridge-domain 66000 detail
  BD-ID Index BSN Age(min) Learning U-Forwrd UU-Flood Flooding ARP-Term arp-ufwd BVI-Intf
  66000 1 0 3 on on flood on off off N/A

           Interface If-idx ISN SHG BVI TxFlood VLAN-Tag-Rewrite
        l2_lisp_gpe1000 4 1 0 - * none
vpp#

Here’s the legitimate BD:

vpp# sh bridge-domain 65100 detail
  BD-ID Index BSN Age(min) Learning U-Forwrd UU-Flood Flooding ARP-Term arp-ufwd BVI-Intf
  65100 2 0 3 on on flood on off off N/A

           Interface If-idx ISN SHG BVI TxFlood VLAN-Tag-Rewrite
        l2_lisp_gpe100 5 3 0 - * none
             tap1 6 3 0 - * none
vpp#

Note: etcd does not have the rogue entry.

[Onong Tayeng (onong)]

This happened when I left the system untouched for a few days and did not restart VPP or the ML2 agent.