Support / Knowledge Base / Portserver II Frame Relay Configuration

Portserver II Frame Relay Configuration

Procedure:

Connecting a PortServer to a Frame Relay link requires several key pieces of information, including LMI, DLCI, BcMax, BcMin, and CIR and the IP number of the remote device.  The example configuration below is for a link between two PortServer Devices connecting two private LANs, for a Main Office and a Remote Office location.

NOTE: [values] in brackets should be replaced with the correct data and no brackets.

Cabling:

Portserver to CSU/DSU Cable Pin-out  (10 wire cable necessary)
Digi International cable part number:  76000252

RJ45Signal DB25Signal
1RxC 17RxC
2DSR 6DSR
3RTS 4RTS
4GND ShellGND
5TxD- 2TxD-
6RxD- 3RxD-
7SG 7SG
8CTS 5CTS
9DTR 20DTR
10TxC 15TxC

NOTE: V.35 is not supported.


Configuring the Main Office PortServer II:

  1. Telnet into the PortServer II and login.
  2. Set up the physical line:
    #> set frame   
    #> set frame ra=[main"s port#] enable=on lmi=[appropriate]
       NOTE: main"s port# is the port on the Main Office PortServer II 
       NOTE: for a leased line, lmi should be none
    
  3. Set up the DLCI table: (For multiple DLCI, repeat this step as necessary).
    set frdlci  
    set frdlci port=[main"s port#] dlci=[main"s dlci for remote] 
    NOTE: for leased line use dlci=128 for both ends
    
    NOTE: Use these commands if necessary
    set frdlci port=[main"s port#] BcMax=[appropriate]
    set frdlci port=[main"s port#] BcMin=[appropriate] CIR=[appropriate]
    NOTE: defaults are  BcMax=56000 BcMin=28000 CIR=56000 which are correct for most DDS 56K lines
    if they are correct they do not need to be re-entered
    
  4. Create a user for each DLCI to bind the IP Address to the DLCI.
    There are two different ways to do this, successful implementation of Frame Relay requires an accurate IP layout of your network. If you are not sure which style to use, consult your network administrator.

    Unnumbered link style

    set user na=remote
    set user na=remote netw
    set user na=remote ipaddr=[remote"s ip] ipmask=[appropriate] protocol=frame 
    set user na=remote frport=[main"s port#] frdlci=[main"s dlci for remote]
    Numbered link style
    set user na=remote
    set user na=remote netw
    set user na=remote ipaddr=[remote"s ip] ipmask=[appropriate] protocol=frame 
    set user na=remote localipaddr=[main"s ip]
    set user na=remote frport=[main"s port#] frdlci=[main"s dlci for remote]
    NOTE: remote"s IP is the main IP number (if it is unnumbered) or the separate IP number 
    of its frame link (if it is numbered).
    
  5. Set up forwarding as appropriate for your network:
    set forw
    set forw state=passive
    NOTE: state options: {off|passive|active}
    
    
  6. Bring up the link:
    set user na=remote dialout=on netrouting=[appropriate] 
      # netrouting options: {off|send|receive|both}
      # netrouting is whether the PortServer II listens 
      # for or broadcasts routing info on the frame

 

    Configuring the Remote Office PortServer II:

    1. Set up the physical line:
      set frame   
      set frame ra=[remote"s port#] enable=on lmi=[appropriate]
      NOTE: remote"s port# is the port on the Remote Office PortServer II
      Note: for a leased line, lmi should be none
      
    2. Set up the DLCI table: (For multiple DLCI, repeat this step as necesary).
      set frdlci  
      set frdlci port=[remote"s port#] dlci=[remote"s dlci for main] 
      NOTE: for leased line use dlci=128 for both ends
      
      NOTE: Use these commands if needed
      set frdlci port=[remote"s port#] BcMax=[appropriate]
      set frdlci port=[remote"s port#] BcMin=[appropriate] CIR=[appropriate]
       # defaults are  BcMax=56000 BcMin=28000 CIR=56000
       # which are correct for most DDS 56K lines
       # if they are correct they do not need to be re-entered
      
    3. Create a user for each DLCI to bind IP to the DLCI.
      There are two different ways to do this, successful implementation of Frame Relay requires correct IP layout of your network. If you are not sure which style to use, consult your network administrator.

      Unnumbered link style

      set user na=main
      set user na=main netw
      set user na=main ipaddr=[main"s ip] ipmask=[appropriate] protocol=frame 
      set user na=main frport=[remote"s port#] frdlci=[remote"s dlci for main]
      Numbered link style
      set user na=main
      set user na=main netw
      set user na=main ipaddr=[main"s ip] ipmask=[appropriate] protocol=frame 
      set user na=main localipaddr=[remote"s ip]
      set user na=main frport=[remote"s port#] frdlci=[remote"s dlci for main]
    4. Set up forwarding as appropriate for your network:
      set forw
      set forw state=passive
      NOTE: state options: {off|passive|active}
      
      
    5. Bring up the link:
      set user na=main dialout=on netrouting=[appropriate] 
        # netrouting options: {off|send|receive|both}
        # netrouting is whether the PortServer II listens 
        # for or broadcasts routing info on the frame
      NOTE: See the following links for tracing samples and configuration examples showing the frame setup for:
      1. Main Office (or do a search on "Main Office" for configuration example).
      2. Remote Office (or do a search on "Remote Office" for configuration example).
      
    Last updated: Aug 23, 2018

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