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Conference irocz::common_brouters

Title:Digital Brouters Conference
Notice:New common-code brouter family: RouteAbout, DECswitch 900
Moderator:MARVIN::HARTLL
Created:Mon Jul 17 1995
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:929
Total number of notes:3736

785.0. "setup metric in DECswitch interface" by 21272::THR_CHICO () Thu Mar 06 1997 12:09

    
    I need to setup a different IP metric in a DECswitch 900EF Router
    interface.
    
    In OSF/1 the command to setup is :   ifconfig ln0 metric 2
    
    Is there a command like this in DECswitch ?
    
    If not , Will it be supported in the future ?
    
    
    Thanks in advance,
    
    
    Francisco
T.RTitleUserPersonal
Name		DateLines
785.1depends on the protocolMARVIN::HARTTony Hart, InterNetworking Prod. Eng. GroupThu Mar 06 1997 12:447
The cost of a circuit depends on the routing protocol you're using, for OSPF
you would use the "OSPF Config>set interface .....".  If you're running RIP
then you're out of luck since it uses hop-counts rather than metrics.

Why do you want to change the cost ?  

Tony
785.2I use RIP and I need to setup a interf. metric21272::THR_CHICOThu Mar 06 1997 14:3224
    
    Hi,
    
    Thanks for the answer,
    
    I really need to change the cost of one interface in DECswitch. I use
    RIP. I have a lot of routers and I can do it in all of them. Why can't I
    do that on DECswitch ??
    
    I need it because I have the DECswitch connected in 3 networks ( FDDI,
    Ethernet and Hub's backplane). If another station that is connected to
    the same FDDI and Ethernet sends an IP message to a station connected to 
    the backplane the message goes to ETHERNET instead of FDDI. I want the
    message goes to FDDI, then to a DECswitch, then to a station connected
    in the backplane. I really dont't want to setup any statics routes.
    
    To implement it I will setup all machines, that are the gateways between 
    FDDI and Ethernet, to have metric 1 on Ethernet and metric 0 on FDDI.
    
    
    Thanks in advance,
    
    	Francisco.
785.3MARVIN::HARTTony Hart, InterNetworking Prod. Eng. GroupFri Mar 07 1997 05:536
Francisco,
	Unfortunately you can't change the RIP cost on an interface.  So you'd
have to use static routes (and tell RIP not to override them) or turn RIP
reception off on the Ethernet.

Tony
785.4what about the next release ?21272::THR_CHICOFri Mar 07 1997 07:5613
    
    That's too bad !!
    
    Do you know if this feature will be available in a next release of this
    software ?
    
    My customer is really worry because He spent a Lot of money with this  
    hardware, and this hardware doesn't attend his needs !!!! :-(
    
    The IP router  implementation in DECswitch is poor in comparation with
    its price.
    
    Francisco   :-(
785.5MARVIN::HARTTony Hart, InterNetworking Prod. Eng. GroupFri Mar 07 1997 09:0223
>    Do you know if this feature will be available in a next release of this
>    software 

	Its not in any plans.  The only way its likely to get in is if you
	make a formal request for the feature.


>    My customer is really worry because He spent a Lot of money with this  
>    hardware, and this hardware doesn't attend his needs !!!! :-(
>    
>    The IP router  implementation in DECswitch is poor in comparation with
>    its price.

	Please make of list of missing features and their importance to your
	customer and let the RouteABout/DECSwitch management know 
	or make a formal request for the features to be added.  You will
	probably have a better idea of what features are missing than most
	people in engineering.

	Out of interest can you tell me which of the Routers you're using
	support changing the RIP circuit cost ?

	Tony
785.6list of routers that support21272::THR_CHICOTue Mar 11 1997 08:0815
    
    Routers that support changes in the circuit's cost :
    
    - All DECstation with OSF/1
    
    - HP routers ER
    
    - DEC wanrouter 250
    
    I will make my list of desirable features...
    
    Thanks for all..
    
    
    Francisco
785.7MARVIN::HARTTony Hart, InterNetworking Prod. Eng. GroupTue Mar 11 1997 08:214
Thanks for the info.  I notice Cisco isn't on the list, do you know if they
support changing the RIP cost ?

Tony
785.8MARVIN::CLEVELANDWed Mar 12 1997 03:038
    
>    - DEC wanrouter 250
    
    I don't remember WANrouter supporting this, but if it did then DECnis
    would have as well.  Note we're talking about changing the RIP cost of
    a circuit, not IS-IS metrics....
785.9MARVIN::HARTTony Hart, InterNetworking Prod. Eng. GroupWed Mar 12 1997 03:304
The DECNIS doesn't support it.  Also the only attribute in the ROUTING MSL that
comes close is "RIP Send Local Metric" but thats a ROUTING entity attribute
not a ROUTING CIRCUIT attribute so it won't help here anyway.
785.10the problem continues...21272::THR_CHICOThu Mar 13 1997 17:1111
    
    Ok,
    
    When I talked about wan-router support for RIP cost I was thinking in
    "RIP Send Local Metric". I'm sorry ...
    
    The major problem is that DEcswitch EF has 6 interfaces ethernets and one
    FDDI and you can't say do him that the FDDI is more FAST !!! or you
    can't say to him that one interface ETHERNET is better then other :-(
    
    Francisco
785.11That's the way RIP isMARVIN::HARTTony Hart, InterNetworking Prod. Eng. GroupFri Mar 14 1997 03:0712
>    The major problem is that DEcswitch EF has 6 interfaces ethernets and one
>    FDDI and you can't say do him that the FDDI is more FAST !!! or you
>    can't say to him that one interface ETHERNET is better then other :-(
 
	This is a feature of RIP.  It doesn't use costs it uses hops, the
protocol assumes that all links are equal.  With a hop-limit of 16 you have
very little scope for assigning different values to a circuit.

	I would suggest either running OSPF or use static routes on one of the
interfaces to override the RIP routes.

Tony