Hello.  I'm contacting you to inform you that pump doesn't work with
Nortel's
Passport switches' DHCP relay agent.  In particular, the switch will relay
the
initial request, but the second DHCP_DISCOVER message has the message
type at the end of the option set and the switch does not forward this
message,
thus the client never receives an address.  Reordering the options in the
second request so that the message type (DHCP_DISCOVER) appears at
the start instead of the end resolves this problem.  Nortel is also aware
but
we've found them very unwilling to believe that it's something they're
doing
wrong (we even had an engineer on site today to observe it).  It may affect
others with Nortel equipment.

The patch below (applied against pump-0.8.3) provides a work-around as
descrbed
above:

*** dhcp.c      Thu Dec 14 23:22:58 2000
--- dhcp.c-patched      Thu Dec 14 23:23:19 2000
***************
*** 1225,1230 ****
--- 1225,1234 ----

        initVendorCodes(&breq);

+       /* This goes; here to make Nortel Passport 8010 happy - tschroed */
+       messageType = DHCP_TYPE_DISCOVER;
+       addVendorCode(&breq, DHCP_OPTION_TYPE, 1, &messageType);
+ 
        aShort = ntohs(sizeof(struct bootpRequest));
        addVendorCode(&breq, DHCP_OPTION_MAXSIZE, 2, &aShort);

***************
*** 1265,1273 ****

        syslog (LOG_DEBUG, "PUMP: sending second discover");

-       messageType = DHCP_TYPE_DISCOVER;
-       addVendorCode(&breq, DHCP_OPTION_TYPE, 1, &messageType);
- 
        /* Send another DHCP_REQUEST with the proper option list */
        if ((chptr = handleTransaction(s, override, &breq, &bresp,
                                       &broadcastAddr, NULL, 0,
--- 1269,1274 ----
***************
*** 1292,1299 ****
--- 1293,1305 ----
        }

        breq = protoReq;
+ /* Can't do this because message order has changed...
        messageType = DHCP_TYPE_REQUEST;
        addVendorCode(&breq, DHCP_OPTION_TYPE, 1, &messageType);
+ */
+ /* Cheap hack starts now... We assume that the message type is the first
field - tschroed */
+       breq.vendor[6]=DHCP_TYPE_REQUEST;
+       

        addVendorCode(&breq, DHCP_OPTION_SERVER, 4, &serverAddr.sin_addr);
        addVendorCode(&breq, DHCP_OPTION_REQADDR, 4, &bresp.yiaddr);