Hi,

I do run dhcrelay inside a docker container attached to the host network. And I do it twice.

a) dhcrelay -4 -d -m discard -iu ens18 -id br_TB102_TMN 10.160.5.2

a) dhcrelay -4 -d -iu br_TB102_TMN -id br_TB102_DPU 10.160.50.18

both are up and listen

Requesting: ens18 as upstream: Y downstream: N

Requesting: br_TB102_TMN as upstream: N downstream: Y

Internet Systems Consortium DHCP Relay Agent 4.3.6

For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/br_TB102_TMN/7a:59:88:45:a6:23

Sending on LPF/br_TB102_TMN/7a:59:88:45:a6:23

Listening on LPF/ens18/36:78:14:96:53:13

Sending on LPF/ens18/36:78:14:96:53:13

Sending on Socket/fallback

Forwarded BOOTREQUEST for 00:19:92:c6:9d:b6 to 10.160.5.2

Dropping request received on ens18

Forwarded BOOTREQUEST for 00:19:92:c6:9d:b6 to 10.160.5.2

Dropping request received on ens18

Requesting: br_TB102_TMN as upstream: Y downstream: N

Requesting: br_TB102_DPU as upstream: N downstream: Y

Internet Systems Consortium DHCP Relay Agent 4.3.6

For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/br_TB102_DPU/42:b9:9b:1e:1c:c9

Sending on LPF/br_TB102_DPU/42:b9:9b:1e:1c:c9

Listening on LPF/br_TB102_TMN/7a:59:88:45:a6:23

Sending on LPF/br_TB102_TMN/7a:59:88:45:a6:23

Sending on Socket/fallback

Forwarded BOOTREQUEST for 00:19:92:c6:9d:b6 to 10.160.50.18

But the frames which should be forwarded by relay b) only to 10.160.50.18

are also taken from the second dhcrelay a) and forwarded to 10.160.5.2

I don’t see the frames from server a) 10.160.50.18 at the relay b) downstream side.

So it has to do with the listen side.

How can I prevent this shit ?

Or how to setup a two relay linux router ?

Immo

This message has been classified General Business by IMMO WETZEL on Montag, 29. Januar 2018 at 18:44:37.