Re: CSI's TCP/IP ROUTEs

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Subject: Re: CSI's TCP/IP ROUTEs
From: Ed Franks (ewf@e-vse.com)
Date: Wed Nov 11 2009 - 14:37:23 EST 

You can define a different subnet mask for each network. For example:

   define mask,network=10.0.0.0,mask=255.255.255.128

A "query masks" will show: 

 F4 0096 IPN253I << TCP/IP Network Masks >>
 F4 0096 IPN575I  Network: 10.0.0.0 (10) Mask: 255.255.255.128
 F4 0096 IPN575I  Network: 127.0.0.0 (127) Mask: 255.0.0.0
 F4 0096 IPN575I  Network: Default (--) Mask: 255.255.255.0

The "127" network is used internally and the "default" is 
established by "SET MASK="

Your DEFINE ROUTE will then show:

  DEFINE ROUTE,ID=AILVSWT,LINKID=AILVSW0,IPADDR=010.001.020.128
   ID: AILVSWT            Link ID: AILVSW0
   IP Address: 10.1.20.128 Mask: 255.255.255.0
   Net: 10.0.0.0 Subnet: 0.1.20.128 Host: --
   MTU: 0 Max Seg: 32684 Pulse: 60s
   SYN Retran: 1000ms Data Retran: 1000ms Fixed: No
   Retran Min: 500ms Max: 2000ms
   Retry Delay: 500ms  Retries 50
   RWin: 65535

I note that the "Mask:" field is being incorrectly displayed (the
default is shown).  However, you will also see that the Net:
Subnet: and Host: fields are as intended.  In fact, to verify that the
IP address is being correctly decomposed and routed:

 q route,ip=10.1.20.129
 << TCP/IP Routes >>
     IP Address: 10.1.20.129 Mask: 255.255.255.128
     Net: 10.0.0.0 Subnet: 0.1.20.128 Host: 0.0.0.1
  ID: AILVSWT            Link ID: AILVSW0, 0
     IP Address: 10.1.20.128 Mask: 255.255.255.128
     Net: 10.0.0.0 Subnet: 0.1.20.128 Host: --
     MTU: 0 Max Seg: 32684 Pulse: 60s
     SYN Retran: 1000ms Data Retran: 1000ms Fixed: No
     Retran Min: 500ms Max: 2000ms
     Retry Delay: 500ms  Retries 50
     RWin: 65535

Ed Franks
CSI



Frank M. Ramaekers wrote:
> I'm having some trouble define the ROUTEs for a subnetted network.  
> 
> Host (10.1.20.2) --OSA-X(default)---> everything else (gateway 10.1.1.1
>    \
>     \ VSWITCH (internal only network)
>      \
>       Subnet 10.1.20.128 (net) 255.255.255.128 (mask) 10.1.20.200
> (subnet)
> 
> The DEFINE ROUTE won't allow a MASK specification, so it's assuming a
> class B:
> 
> DEFINE ROUTE,ID=AILVSWT,LINKID=AILVSW0,IPADDR=010.001.020.128
>  ID: AILVSWT            Link ID: AILVSW0                     
>     IP Address: 10.1.20.128 Mask: 255.255.0.0                
>     Net: 10.0.0.0 Subnet: 0.1.0.0 Host: 0.0.20.128           
>     MTU: 0 Max Seg: 65495 Pulse: 60s                         
>     SYN Retran: 1000ms Data Retran: 1000ms Fixed: No         
>     Retran Min: 500ms Max: 2000ms                            
>     Retry Delay: 500ms  Retries 50                           
>     RWin: 65535                                              
> 
> Frank M. Ramaekers Jr.
> Systems Programmer                   MCP, MCP+I, MCSE & RHCE
> American Income Life Insurance Co.   Phone: (254)761-6649
> 1200 Wooded Acres Dr.                Fax:   (254)741-5777
> Waco, Texas  76710
> 	
> 
>  
> 
> 
> 
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