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List:       dhcp-client
Subject:    IP renewal fails with my ISP's DHCP-server
From:       Christoph Gysin <cgysin () gmx ! ch>
Date:       2005-01-28 16:18:14
Message-ID: 41FA65C6.3010000 () gmx ! ch
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I have problems renewing my DHCP lease with my ISP's DHCP server. I don't really
understand whats happening here. It seems, that the server answers from two
different IP's (10.182.192.1 and 62.2.28.73) which confuses my dhclient. This
leads to a connection timeout after ~40min. After the timeout, the client does a
DHCPREQUEST on 255.255.255.255 and everything works as expected.

Is this a problem of my ISP?
Can I configure this timeout to be somewhat around 2 minutes? (to work around)
Or can I force dchlient to always do DHCPREQUEST's on the broadcast adress?

Thank you very much

Christoph Gysin

log output:
10:17:07 dhclient: DHCPREQUEST on sis2 to 255.255.255.255 port 67
10:17:07 dhclient: DHCPACK from 10.182.192.1
10:17:07 dhclient: New Network Number: 84.72.128.0
10:17:07 dhclient: New Broadcast Address: 255.255.255.255
10:17:07 dhclient: New IP Address (sis2): 84.72.132.154
10:17:07 dhclient: New Subnet Mask (sis2): 255.255.240.0
10:17:07 dhclient: New Broadcast Address (sis2): 255.255.255.255
10:17:07 dhclient: New Routers: 84.72.128.1
10:17:10 dhclient: bound to 84.72.132.154 -- renewal in 2218 seconds.
10:54:08 dhclient: DHCPREQUEST on sis2 to 62.2.28.73 port 67
10:54:08 dhclient: DHCPACK from 62.2.28.73
10:54:08 dhclient: New Network Number: 84.72.128.0
10:54:08 dhclient: New Broadcast Address: 255.255.255.255
10:54:08 dhclient: bound to 84.72.132.154 -- renewal in 2172 seconds.
11:30:20 dhclient: DHCPREQUEST on sis2 to 62.2.28.73 port 67
11:30:59 last message repeated 5 times
11:32:13 last message repeated 3 times
11:42:48 last message repeated 20 times
11:52:17 last message repeated 8 times
12:02:43 last message repeated 18 times
12:09:12 last message repeated 3 times
12:13:24 dhclient: DHCPREQUEST on sis2 to 255.255.255.255 port 67
12:13:24 dhclient: DHCPNAK from 10.182.192.1
12:13:24 dhclient: DHCPDISCOVER on sis2 to 255.255.255.255 port 67 interval 7
12:13:24 dhclient: DHCPOFFER from 10.182.192.1
12:13:24 dhclient: DHCPREQUEST on sis2 to 255.255.255.255 port 67
12:13:24 dhclient: DHCPACK from 10.182.192.1
12:13:24 dhclient: New Network Number: 84.72.128.0
12:13:24 dhclient: New Broadcast Address: 255.255.255.255
12:13:24 dhclient: New IP Address (sis2): 84.72.142.16
12:13:24 dhclient: New Subnet Mask (sis2): 255.255.240.0
12:13:24 dhclient: New Broadcast Address (sis2): 255.255.255.255
12:13:24 dhclient: New Routers: 84.72.128.1
12:13:27 dhclient: bound to 84.72.142.16 -- renewal in 1392 seconds.
12:36:39 dhclient: DHCPREQUEST on sis2 to 62.2.28.73 port 67
12:37:13 last message repeated 4 times
12:39:01 last message repeated 3 times
12:48:25 last message repeated 13 times
12:59:15 last message repeated 6 times
13:05:29 last message repeated 11 times
13:06:01 dhclient: DHCPREQUEST on sis2 to 255.255.255.255 port 67
13:06:01 dhclient: DHCPNAK from 10.182.192.1
13:06:01 dhclient: DHCPDISCOVER on sis2 to 255.255.255.255 port 67 interval 8
13:06:01 dhclient: DHCPOFFER from 10.182.192.1
13:06:01 dhclient: DHCPREQUEST on sis2 to 255.255.255.255 port 67
13:06:01 dhclient: DHCPACK from 10.182.192.1
13:06:01 dhclient: New Network Number: 84.72.128.0
13:06:01 dhclient: New Broadcast Address: 255.255.255.255
13:06:01 dhclient: New IP Address (sis2): 84.72.143.49
13:06:01 dhclient: New Subnet Mask (sis2): 255.255.240.0
13:06:01 dhclient: New Broadcast Address (sis2): 255.255.255.255
13:06:01 dhclient: New Routers: 84.72.128.1
13:06:04 dhclient: bound to 84.72.143.49 -- renewal in 1693 seconds.
13:34:17 dhclient: DHCPREQUEST on sis2 to 62.2.28.73 port 67
13:34:17 dhclient: DHCPACK from 62.2.28.73
13:34:17 dhclient: New Network Number: 84.72.128.0
13:34:17 dhclient: New Broadcast Address: 255.255.255.255
13:34:17 dhclient: bound to 84.72.143.49 -- renewal in 2152 seconds.
14:10:09 dhclient: DHCPREQUEST on sis2 to 62.2.28.73 port 67
14:10:47 last message repeated 5 times
14:12:42 last message repeated 7 times
14:22:44 last message repeated 18 times
14:30:28 last message repeated 4 times
14:42:10 last message repeated 3 times
14:51:10 last message repeated 8 times
14:54:54 dhclient: DHCPREQUEST on sis2 to 255.255.255.255 port 67
14:54:54 dhclient: DHCPNAK from 10.182.192.1
14:54:54 dhclient: DHCPDISCOVER on sis2 to 255.255.255.255 port 67 interval 7
14:54:54 dhclient: DHCPOFFER from 10.182.192.1
14:54:54 dhclient: DHCPREQUEST on sis2 to 255.255.255.255 port 67
14:54:54 dhclient: DHCPACK from 10.182.192.1

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