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Unknown Router Interface in DVR Mode

Hi everyone,

After I enabled the DVR, my tenant router gets an extra interface in addition to the tenant network gateway. That extra interface only shows up in the Horizon dashboard, not in the command line output. Does anyone know what that interface is for?

Here are some details to help explain what I encounter:

On the compute node:

[root@compute ~]# ip netns 
fip-eadd51b1-1b0a-4504-b694-4f54b7b60d3d (id: 1) 
qrouter-b7570af0-42f6-499d-bbf0-2139a98bc0a3 (id: 0)

[root@compute ~]# ip netns exec qrouter-b7570af0-42f6-499d-bbf0-2139a98bc0a3 ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo         
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: rfp-b7570af0-4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether ca:08:94:69:b9:6c brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 169.254.106.114/31 scope global rfp-b7570af0-4
       valid_lft forever preferred_lft forever
    inet6 fe80::c808:94ff:fe69:b96c/64 scope link
       valid_lft forever preferred_lft forever
13: qr-bd3e180e-2d: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether fa:16:3e:c4:a8:3c brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.1/24 brd 192.168.0.255 scope global qr-bd3e180e-2d
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fec4:a83c/64 scope link
       valid_lft forever preferred_lft forever

In above, the router has only one qr interface (qr-bd3e180e-2d) at IP 192.168.0.1/24 which is the tenant network gateway, as expected.

From the Horizon dashboard:

Name                          Fixed IPs
(bd3e180e-2dd6)               192.168.0.1
(da7884d9-2ff1)               192.168.0.5

Notice there is an extra, unknown interface (da7884d9-2ff1) at 192.168.0.5. Could someone explain to me what that interface is for?

Thank you very much!

Unknown Router Interface in DVR Mode

Hi everyone,

After I enabled the DVR, my tenant router gets an extra interface in addition to the tenant network gateway. That extra interface only shows up in the Horizon dashboard, not in the command line output. Does anyone know what that interface is for?

Here are some details to help explain what I encounter:encountered:

On the compute node:

[root@compute ~]# ip netns 
fip-eadd51b1-1b0a-4504-b694-4f54b7b60d3d (id: 1) 
qrouter-b7570af0-42f6-499d-bbf0-2139a98bc0a3 (id: 0)

[root@compute ~]# ip netns exec qrouter-b7570af0-42f6-499d-bbf0-2139a98bc0a3 ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo         
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: rfp-b7570af0-4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether ca:08:94:69:b9:6c brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 169.254.106.114/31 scope global rfp-b7570af0-4
       valid_lft forever preferred_lft forever
    inet6 fe80::c808:94ff:fe69:b96c/64 scope link
       valid_lft forever preferred_lft forever
13: qr-bd3e180e-2d: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether fa:16:3e:c4:a8:3c brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.1/24 brd 192.168.0.255 scope global qr-bd3e180e-2d
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fec4:a83c/64 scope link
       valid_lft forever preferred_lft forever

In above, the router has only one qr interface (qr-bd3e180e-2d) at IP 192.168.0.1/24 which is the tenant network gateway, as expected.

From the Horizon dashboard:

Name                          Fixed IPs
(bd3e180e-2dd6)               192.168.0.1
(da7884d9-2ff1)               192.168.0.5

Notice there is an extra, unknown interface (da7884d9-2ff1) at 192.168.0.5. Could someone explain to me what that interface is for?

Thank you very much!