Accessing MS Network via VLAN

[normanzhang]

Hi,

I've setup 2 VLANs on C3550. I would like to allow Windows clients in VLAN1 (192.168.99.0/24) to access NT DC and other Windows Servers in VLAN2 (192.168.11.0/26). So far I managed to access the server by manually setting /winnt/system32/drives/etc/hosts in the clients. But the clients cannot logon to the domain (as RPC broadcast dropped by VLAN?). Is there a way I can fix this on the C3550. I have setup C3550 to give out DHCP. Is there a way I can push the NetBEUI settings along with DHCP? I don't have WINS setup in my DC. I would greatly appreciate if someone could give me a few pointers.

Regards,

Norman

[rais · Accepted solution]

Since hosts in host file are working, I assume routing is all fine.

Use 'ip helper address ' command in the switch to divert broadcasts to the NT server.

HTH

[milan.kulik]

Hi,

this might help:

http://www.cisco.com/warp/public/473/winnt_dg.pdf

Regards,

Milan

[nidkaz · Accepted solution]

Hi

If you use the command :

ip helper-address

The clients will be able to login to the domain, & the PCs can have their IP addresses from the NT server: because DHCP & NetBios are forwarded with the ip herlper address.

Regards,

NK

[normanzhang]

It seems that ip helper-address is undocumented or unsupported on C3550. I tried to add it using the following steps, but couldn't get it to work. Am I doing something wrong?

Regards,

Norman

(config)# int vlan1

(config-if)# ip helper-address 192.168.11.2

(config-if)# end

#sh int vlan1

Vlan1 is up, line protocol is up

Hardware is EtherSVI, address is 000f.9014.1080 (bia 000f.9014.1080)

Internet address is 192.168.99.1/24

MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:03:28, output 00:00:06, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 4

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

180 packets input, 25034 bytes, 0 no buffer

Received 0 broadcasts (0 IP multicast)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

151 packets output, 13268 bytes, 0 underruns

0 output errors, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

[normanzhang]

Sorry, my mistake. Setting ip helper-address works. The problem was that I forgot to set the hosts, lmhosts.sam file on the clients. Currently the clients receive DHCP from C3550 via DHCP Pool. I guess there's no alternative to automatically load hosts, lmhosts.sam from C3550 besides setting up WINS?

Regards,

Norman