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3015 Proxy DHCP problem

The VPN is inserting the Scope Address as a giaddr in the request. The DHCP server then uses this as the return address (IP Header) with the result that the DHCP timer on the VPN expires as no response is coming back. The request is via the Private interface on 10.12.12.12

See snoop for request and response

Request

DHCP: ----- Dynamic Host Configuration Protocol -----

DHCP:

DHCP: Hardware address type (htype) = 1 (Ethernet (10Mb))

DHCP: Hardware address length (hlen) = 6 octets

DHCP: Relay agent hops = 0

DHCP: Transaction ID = 0xbc2da69e

DHCP: Time since boot = 0 seconds

DHCP: Flags = 0x0000

DHCP: Client address (ciaddr) = 0.0.0.0

DHCP: Your client address (yiaddr) = 0.0.0.0

DHCP: Next server address (siaddr) = 0.0.0.0

DHCP: Relay agent address (giaddr) = 10.11.11.1

DHCP: Client hardware address (chaddr)= 00:03:A0:89:7B:F4

Response

IP: ----- IP Header -----

IP:

IP: Version = 4

IP: Header length = 20 bytes

IP: Type of service = 0x00

IP: xxx. .... = 0 (precedence)

IP: ...0 .... = normal delay

IP: .... 0... = normal throughput

IP: .... .0.. = normal reliability

IP: Total length = 328 bytes

IP: Identification = 7747

IP: Flags = 0x0

IP: .0.. .... = may fragment

IP: ..0. .... = last fragment

IP: Fragment offset = 0 bytes

IP: Time to live = 255 seconds/hops

IP: Protocol = 17 (UDP)

IP: Header checksum = 5404

IP: Source address = 10.10.10.1, servername

IP: Destination address = 10.11.11.1, 10.11.11.1

2 REPLIES
Silver

Re: 3015 Proxy DHCP problem

Did you try adjusting the lease time on the internal 3015 DHCP setting ?

New Member

Re: 3015 Proxy DHCP problem

Yes..Made it 3600 minutes and also changed the timeout to 30 seconds.

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