Github user borisstoyanov commented on the issue:
https://github.com/apache/cloudstack/pull/2003
@ustcweizhou
- I was able to restart the network with cleanup. New VR came up with
duplicated eth2 and eth3.

- Not sure what you mean by what is my last commit, currently this PR has
been built and deployed on the physical hosts.
- There are 3 nics in the DB for that router.
```
*************************** 8. row ***************************
id: 8
uuid: 9a2d5343-fbff-487e-a48d-509ae0503687
instance_id: 4
mac_address: 02:00:19:89:00:02
ip4_address: 10.1.1.1
netmask: 255.255.255.0
gateway: NULL
ip_type: NULL
broadcast_uri: vlan://884
network_id: 204
mode: Dhcp
state: Reserved
strategy: Start
reserver_name: ExternalGuestNetworkGuru
reservation_id: 2f428f23-afae-4916-a423-4a7452a33138
device_id: 0
update_time: 2017-03-14 13:41:23
isolation_uri: vlan://884
ip6_address: NULL
default_nic: 0
vm_type: DomainRouter
created: 2017-03-14 09:31:29
removed: NULL
ip6_gateway: NULL
ip6_cidr: NULL
secondary_ip: 0
display_nic: 1
*************************** 9. row ***************************
id: 9
uuid: bb36a0a5-ac45-45ac-976f-341e2d2c72be
instance_id: 4
mac_address: 0e:00:a9:fe:00:44
ip4_address: 169.254.0.68
netmask: 255.255.0.0
gateway: 169.254.0.1
ip_type: Ip4
broadcast_uri: NULL
network_id: 202
mode: Static
state: Reserved
strategy: Start
reserver_name: ControlNetworkGuru
reservation_id: 2f428f23-afae-4916-a423-4a7452a33138
device_id: 1
update_time: 2017-03-14 13:41:23
isolation_uri: NULL
ip6_address: NULL
default_nic: 0
vm_type: DomainRouter
created: 2017-03-14 09:31:29
removed: NULL
ip6_gateway: NULL
ip6_cidr: NULL
secondary_ip: 0
display_nic: 1
*************************** 10. row ***************************
id: 10
uuid: a4e7691b-b290-4bfe-905e-ddb3c5b1c466
instance_id: 4
mac_address: 06:bb:c8:00:00:03
ip4_address: 10.1.35.83
netmask: 255.255.224.0
gateway: 10.1.63.254
ip_type: NULL
broadcast_uri: vlan://7
network_id: 200
mode: Static
state: Reserved
strategy: Managed
reserver_name: PublicNetworkGuru
reservation_id: NULL
device_id: 2
update_time: 2017-03-14 13:41:23
isolation_uri: vlan://7
ip6_address: NULL
default_nic: 1
vm_type: DomainRouter
created: 2017-03-14 09:31:29
removed: NULL
ip6_gateway: NULL
ip6_cidr: NULL
secondary_ip: 0
display_nic: 1
```
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