Priscilla,
Well, it�s been an interesting project. Unfortunately, the DHCP server app
that I wound up trying (Vicomsoft) was so buggy that I couldn�t keep it from
crashing. Even when it was running, it was highly, highly unstable.
Granted, it was a demo, but I would think a demo would have basic
functionality.
Furthermore, I couldn�t get into the console port of the 2900XL. Tried
everything. The darned port is fried.
So�here is what I came up with:
2621
|
| <--100Mb/s dot1q trunk
|
Foundry Networks switch
| |
| | <--100Mb/s access ports
| |
DHCP Serv DHCP Client
The 2621, with 64M of memory and 8M of flash, is running 12.1-18 IP Plus. I
don�t know much about the Foundry switch. It was straight out of the box
just yesterday. I configured it with a dot1q trunk to the router, an access
port in vlan 100 (192.168.1.0/24), and an access port in vlan 200
(192.168.2.0/24). The server (192.168.1.100) was attached to VLAN 100 and
the client (192.168.2.?) to vlan 200. The router subinterfaces were the .1
address. Subinterface F0/0.2 had an IP helper address of 192.168.1.100.
On a couple of occasions I moved the client to vlan 100. The server did
actually work two or three times with a local client. It never once worked
with a non-local client. The good news is that the DHCP Discovery crossed
the vlans via the 2621 and looked to be in pretty good shape:
Frame 44 (343 bytes on wire, 343 bytes captured)
Arrival Time: Dec 21, 2002 18:01:21.694951000
Time delta from previous packet: 0.721309000 seconds
Time relative to first packet: 40.720429000 seconds
Frame Number: 44
Packet Length: 343 bytes
Capture Length: 343 bytes
Ethernet II, Src: 00:02:fd:1d:c0:20, Dst: 00:08:74:03:77:b5
Destination: 00:08:74:03:77:b5 (Dell_Com_03:77:b5)
Source: 00:02:fd:1d:c0:20 (Cisco_1d:c0:20)
Type: IP (0x0800)
Internet Protocol, Src Addr: 192.168.2.1 (192.168.2.1), Dst Addr:
192.168.1.100 (192.168.1.100)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 329
Identification: 0x0061
Flags: 0x00
.0.. = Don't fragment: Not set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 255
Protocol: UDP (0x11)
Header checksum: 0x358d (correct)
Source: 192.168.2.1 (192.168.2.1)
Destination: 192.168.1.100 (192.168.1.100)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67)
Source port: bootps (67)
Destination port: bootps (67)
Length: 309
Checksum: 0xde84 (correct)
Bootstrap Protocol
Message type: Boot Request (1)
Hardware type: Ethernet
Hardware address length: 6
Hops: 1
Transaction ID: 0xcb4d080c
Seconds elapsed: 17250
Bootp flags: 0x8000 (Broadcast)
1... .... .... .... = Broadcast flag: Broadcast
.000 0000 0000 0000 = Reserved flags: 0x0000
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 0.0.0.0 (0.0.0.0)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 192.168.2.1 (192.168.2.1)
Client hardware address: 00:06:5b:e4:d3:97
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP Discover
Unknown Option Code: 251 (1 bytes)
Option 61: Client identifier
Hardware type: Ethernet
Client hardware address: 00:06:5b:e4:d3:97
Option 50: Requested IP Address = 192.168.1.2
Option 12: Host Name = "laprmccarverGFE"
Option 60: Vendor class identifier = "MSFT 5.0"
Option 55: Parameter Request List
1 = Subnet Mask
15 = Domain Name
3 = Router
Notice the relay agent address of 192.168.2.1. That bodes well. However,
for some reason, this was the response:
Frame 45 (70 bytes on wire, 70 bytes captured)
Arrival Time: Dec 21, 2002 18:01:21.695010000
Time delta from previous packet: 0.000059000 seconds
Time relative to first packet: 40.720488000 seconds
Frame Number: 45
Packet Length: 70 bytes
Capture Length: 70 bytes
Ethernet II, Src: 00:08:74:03:77:b5, Dst: 00:02:fd:1d:c0:20
Destination: 00:02:fd:1d:c0:20 (Cisco_1d:c0:20)
Source: 00:08:74:03:77:b5 (Dell_Com_03:77:b5)
Type: IP (0x0800)
Internet Protocol, Src Addr: 192.168.1.100 (192.168.1.100), Dst Addr:
192.168.2.1 (192.168.2.1)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 56
Identification: 0x015b
Flags: 0x00
.0.. = Don't fragment: Not set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 128
Protocol: ICMP (0x01)
Header checksum: 0xb4b4 (correct)
Source: 192.168.1.100 (192.168.1.100)
Destination: 192.168.2.1 (192.168.2.1)
Internet Control Message Protocol
Type: 3 (Destination unreachable)
Code: 3 (Port unreachable)
Checksum: 0x1cbd (correct)
Internet Protocol, Src Addr: 192.168.2.1 (192.168.2.1), Dst Addr:
192.168.1.100 (192.168.1.100)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 329
Identification: 0x0061
Flags: 0x00
.0.. = Don't fragment: Not set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 255
Protocol: UDP (0x11)
Header checksum: 0x358d (correct)
Source: 192.168.2.1 (192.168.2.1)
Destination: 192.168.1.100 (192.168.1.100)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67)
Source port: bootps (67)
Destination port: bootps (67)
Length: 309
Checksum: 0xde84
I�m convinced it was the server app. So if someone can point me to a better
one, I�ll just bet this will work fine. I didn�t think to try it without IP
Plus. Would you like me to? The truth is, trunking support/functionality
seems to be on a case-by-case basis where the 2600s are concerned.
Scott
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=59724&t=59724
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
