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Draytek Vigor 2820n - Fails to get DHCP IP on Virgin Media
- mazingtree
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27 Apr 2008 01:50 #7
by mazingtree
Replied by mazingtree on topic Draytek Vigor 2820n - Fails to get DHCP IP on Virgin Media
Errors on the Scientific Atlantic Modem
Time Not Established Error (4) ToD request sent- No Response received
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Anyone know if these are "normal"
Time Not Established Error (4) ToD request sent- No Response received
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Anyone know if these are "normal"
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- spike.robinson
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27 Apr 2008 02:41 #8
by spike.robinson
Replied by spike.robinson on topic Draytek Vigor 2820n - Fails to get DHCP IP on Virgin Media
I do get those errors on my Virgin modem, but then my setup is not very normal as I don't have a working DHCP client on my router.
Might be interesting to hook your laptop up to the cable modem and see if those errors go away.
Might be interesting to hook your laptop up to the cable modem and see if those errors go away.
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- louis-m
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27 Apr 2008 10:13 #9
by louis-m
![:( :(](/media/kunena/emoticons/18.png)
2820 = 3.3.2_RC5
2950 = 3.2.4
Replied by louis-m on topic Draytek Vigor 2820n - Fails to get DHCP IP on Virgin Media
![:( :(](/media/kunena/emoticons/18.png)
2820 = 3.3.2_RC5
2950 = 3.2.4
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- mazingtree
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20 May 2008 18:33 #10
by mazingtree
Replied by mazingtree on topic Draytek Vigor 2820n - Fails to get DHCP IP on Virgin Media
Further to the above:
1. I have been working with Draytek support (R&D) and will post again if we get to the bottom of why this is happening.
So Far:
2. I have carried out a number of packet captures of the DHCP process. The Draytek router sends a DHCPDiscover broadcast with IP=0.0.0.0 after the modem has booted up, but the server fails to respond with a DHCP Offer to give me a public IP address.
3. Further testing with other devices - e.g. My Lenovo IBM T60 Laptop, Buffalo Router and a Cisco 871 Router all work fine and receive a DHCPOffer and consequently pick up an IP Address.
4. I can replay a packet from both the Draytek and the Cisco and on every occasion the Cisco gets a reply but the Draytek does not.
1. I have been working with Draytek support (R&D) and will post again if we get to the bottom of why this is happening.
So Far:
2. I have carried out a number of packet captures of the DHCP process. The Draytek router sends a DHCPDiscover broadcast with IP=0.0.0.0 after the modem has booted up, but the server fails to respond with a DHCP Offer to give me a public IP address.
3. Further testing with other devices - e.g. My Lenovo IBM T60 Laptop, Buffalo Router and a Cisco 871 Router all work fine and receive a DHCPOffer and consequently pick up an IP Address.
4. I can replay a packet from both the Draytek and the Cisco and on every occasion the Cisco gets a reply but the Draytek does not.
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- andy666
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18 May 2009 15:32 #11
by andy666
Replied by andy666 on topic Draytek Vigor 2820n - Fails to get DHCP IP on Virgin Media
i had a similar issue with virgin. draytek would get the initial dhcp (192.168) address from the virgin mode, but then fail getting an external address. i upgraded to 3.3.2_RC1 and this has resolved the issue.
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- mazingtree
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20 May 2009 00:05 #12
by mazingtree
Replied by mazingtree on topic Draytek Vigor 2820n - Fails to get DHCP IP on Virgin Media
The issue just suddenly went away for me. I don't think it was due to an upgraded fimware, but it's possible. At the time I had been trying various firmware, from Tech Support and also the latest versions. I reckon it could have been due to a problem with the Virgin Media that was resolved/changed, even hough it was only the 2820 Draytek router that was affected - Other routers, Cisco 870 series, Buffalo WGR-54G and Netgear WGR614 all worked everytime.
I had not had an issue before it started, then one day it wouldn't connect after several months of hassle it simply went away again!
Bizarre.
John
I had not had an issue before it started, then one day it wouldn't connect after several months of hassle it simply went away again!
Bizarre.
John
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