Cisco 678 bridging help.

[ek]

Not sure if this message belongs here or not, but I need help setting up my Cisco 678 in bridging mode.

I've gone through many pages and forums trying to figure this out but with no luck. I'm currently using a ZyXEL Prestige 600 series modem which works fine but "chokes" out every so often and I have to power cycle which leads to firewall reboot. I've never had problems like this with the Cisco, so I want to use it instead.

I know the line is DMT and the Cisco SHOULD be in DMT(If there's a way to check, please let me know). I have multiple static IPs which I assign to the firewall machine itself along with the default router address. I also have the vpi and vci settings from the ISP, but still haven't been able to get it to work. Any help would be excellent. Thanks in advance.

Regards,
Janky Edwards

[Mntsnow]

Welcome to XPC EK.

Anyways to check what version you have all you have to do is log into your router and do a "show ver" without the quotes and it will list the cbos version that the router is flashed with. the "show help" again without quotes is helpful to see what other info you can glean

If you are sure your DSL line is configured for "Bridge Mode" follow these instructions.

For Bridging mode (DMT Configured line) Type what is after the ">" or "#" sign and hit the enter key

cbos> enable
password prompt: [enter] or your exec password
cbos# set nvram erase
cbos# write
cbos# reboot
Welcome message, hit [enter]
password prompt: [enter] or your exec password
cbos> enable
password prompt: [enter]
cbos# set bridging rfc1483 enable
cbos# set int wan0-0 disable
cbos# set int wan0-0 vpi 0
cbos# set int wan0-0 vci 32
cbos# set int wan0-0 enable
cbos# set bridging management enabled
cbos# write
cbos# reboot

You're done!



and here is how to config the cisco 67x's for static IP's in ppp mode (which is what I use)

IMPORTANT: Before you begin configuring your modem, the DHCP client in the PC should be disabled and should be configured statically with one of your static IP's addresses from the assigned block with a subnet mask set to whatever your isp gave you. (DO NOT use your "gateway ip" which will be assigned to your cisco router)

Using the current User Guide for the Cisco 678, connect the 675 or 678 modem to a COM port on the PC.

Start the Hyperterminal program. Set the connection parameters for the program as provided in your manual. Be sure to disable any flow control


Enter the "exec" and the "enable" passwords (if set) and check that the software version is 2.4.6 for the 678. The factory defaults for these passwords are blank.

You will see the prompt CBOS#. CBOS stands for Cisco Broadband Operating System and the # sign indicates that the modem is in the "enabled" or "privileged" mode for accepting configuration commands.

Where it says TYPE, enter what is inside the quote marks but NOT the quotes

Type "set nvram erase"

Type "write" This command, in combination with the previous one, erases all configuration commands from the non-volatile RAM.

Type "reboot" This causes the modem to reboot and come up with the default configuration. which is PPP mode.

upon reboot Enter the "exec" and the "enable" passwords again. You will see the prompt CBOS#.

Type "set nat disable" This disables Network Address Translation (NAT) so that private addresses cannot be routed by the 675 or 678.

Type "set dhcp server disable" This disables the 675 or 678 from acting as a DHCP server.

Type "set PPP wan0-0 ipcp 0.0.0.0" (zeroes and not the letter O.) This causes the modem to negotiate via PPP an IP address for the modem. The network has

been configured by the engineers to send the second highest value via the PPP negotiation. This actually becomes the IP address of the Ethernet interface with NAT disabled.

Type "set ppp wan0-0 dns 0.0.0.0"

Type "set PPP wan0-0 login xxxxx" where xxxxx is your user name assigned by your ISP.

Type "set PPP wan0-0 password yyyyy" where yyyyy is the password initially assigned to you. IMPORTANT: The user name and password are case-sensitive.

Type "set PPP restart enabled" If for some reason the 675 or 678 goes "untrained" during a session, this will automatically attempt to re-train the unit until successful.

Type "set int eth0 address zzz.zzz.zzz.zzz" where zzz.zzz.zzz.zzz is the Gateway Address from your block of Static IP's

Type "set int eth0 netmask 255.255.255.xxx" where the xxx is the subnet mask number your isp gave you

If the service is in CAP mode, Skip to the write step below.

If The service is in DMT mode, the Cisco modem needs the following commands as well:

Type "set int wan0-0 disable"

Type "set int wan0-0 vpi 0"

Type "set int wan0-0 vci 32"

Type "set int wan0-0 enable"

Type "write"

Type "reboot"


After reboot log in to the 675 or 678 with the exec and enable passwords.

Type "sh nat" Verify that NAT is turned off.

Type "sh dhcp server" Verify that the DHCP server is turned off.

Type "sh int eth0" The IP address of the Ethernet interface should be the IP that your ISP assigned to you for the "Gateway".

[ek]

Hello, Mntsnow. Thank you for the reply.

I called my ISP yesterday to get a little info on the setup and they ensured me the line was DMT. They also told me the vci was 38. The ZyXEL modem is also in rfc1483 bridging mode from what they said so I figured this would be an easy setup.

My firmware version out put from the Cisco is this:
cbos#show ver

Cisco Broadband Operating System
CBOS (tm) 678 Software (C678-I-M), Version v2.4.7 - Re
Copyright (c) 1986-2001 by cisco Systems, Inc.
Compiled Aug 16 2002 13:54:07
DMT FULL firmware version G96
NVRAM image at 0x1030ea40

*** RFC1483 Bridging Mode Enabled ***

cbos#

So far so good, right?

I used this to setup the Cisco from your info:
cbos# set nvram erase
cbos# write
cbos# reboot
Welcome message, hit [enter]
password prompt: [enter] or your exec password
cbos> enable
password prompt: [enter]
cbos# set bridging rfc1483 enable
cbos# set int wan0-0 disable
cbos# set int wan0-0 vpi 0
cbos# set int wan0-0 vci 38
cbos# set int wan0-0 enable
cbos# set bridging management enabled
cbos# write
cbos# reboot

I'm not sure if I use the same setup as the ZyXEL afterwards though. I have my firewall box assign itself all the IPs I own and have the default router set as the ISP's default router(Same setup with the ZyXEL). So far, still no luck. I'll call the ISP again today and make sure I'm not forgetting anything. Maybe they have something "extra". *shrugs*. Thanks for your help.

Regards,
Janky Edwards

[Mntsnow]

I'm not familar with the ZyXEL modems so I cant answer that for you. Hopefully your ISP can. As for the VCI being 38 instead of my 32 that should be fine as I'm now finding out some ISPs are using that value. My ISP uses 32 and so thats what I had in mind. I guess I should have put XX there instead, Sorry about that :(

Best of luck

[ek]

Quite alright. Again, thanks for the quick replies.

Regards,
Janky Edwards

[ek]

Ah. Talked to a much more informative tech at the ISP. Apparently the Cisco678 doesn't reach the requirements of the DSLAM's setup. So all hope is lost. That sure explains a lot. Haha. Anyways, thanks for your help, Mntsnow.

Case closed... =(

Regards,
Janky Edwards

[Mntsnow]

Sorry to hear that :(