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Conference noted::decnis

Title:	DEC Network Integration Server (DECNIS)
Notice:	Please read note 1 to use this conference effectively
Moderator:	MARVIN::WELCH

Created:	Wed Sep 18 1991
Last Modified:	Thu Jun 05 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	3660
Total number of notes:	15082

3617.0. "How to announce a "Default Route" ?" by BRSADV::PACCO (Horum omnium fortissimi sunt Belgae) Mon Apr 28 1997 17:28

    May I submit the following simple question, related to the customer
    Belgacom.
    
    Actually a DECnis (IS-IS Level 2) is propagating hundreths of IP
    subnets onto an Ethernet LAN.  The DECnis is only propagating, not
    listening to RIP announcements.
    
    These subnets come from IS-ISLevel2-External, Is-ISLevel2Internal,
    Is-ISlevel1 and STATIC sources.
    
    I would like to disable the
    ROUTING CONTROL PROTOCOL RIP Propagate Destinations with source type
    	IS-ISLevel2-External, Is-ISLevel2Internal, Is-ISlevel1
    and replace these with only 1 announcement : a DEFAULT ROUTE.
    
    I ONLY want to propagate this DEFAULT ROUTE to the LAN,
    to minimise the RIP traffic on the LAN.  The ROUTER will
    have to determine later on if it is capable to route the IP traffic or
    not.  The router has no problem to announce a DEFAULT ROUTE which it
    gets from elsewhere(Section 10.7.4 page 10-28), but I do not see how t
    issue a default route or create a static default route without having to
    specify a 'next hop'(Section 9.15.3 page 9-44).
    
    Which is the crucial NCL COMMAND ? Note I do not use the configurator.
    
    Kind regards,
    	Dominique.
    Altough I have read about "Announce Default Route" I

T.R	Title	User	Personal Name	Date	Lines
3617.1		MARVIN::PATEL		`Tue Apr 29 1997 04:44`	4
	Create a RIP propagate destination. Set it to match exact, source local, set rip state to send only, filter action to pass, metric to whatever you want to announce the route at and enable it. By the way this is all in the documenatation - did you check the docs first?
3617.2		BRSADV::PACCO	Horum omnium fortissimi sunt Belgae	`Tue Apr 29 1997 06:52`	102
	Jitu, Yes I have read the manual many, many times. The NCL script I used until now for Level 2 routers is the following. The lines starting with > are of interest now. All "routed" routes are propagated by RIP, however no default route is announced (has never be from this source). As I understand the documentation, the propagation destination is a FILTER (address match) which allows to forward all routes known in a table (source) provided these are described by the set of domains. My understanding is that the LOCAL routing table does not contain a default route, and the propagate destination is not able to announce this default route. Kind regards, Dominique. create routing network protocol IP ! >create routing network protocol IP domain DEFAULT_ROUTE_DOMAIN >set routing network protocol IP domain DEFAULT_ROUTE_DOMAIN - > ip address {{ addr=0.0.0.0 , mask=0.0.0.0 }} ! create routing network protocol IP domain STATIC_ROUTES_DOMAIN ! >create routing control protocol RIP type IP RIP >set routing control protocol RIP RIP state send only ! ! create routing control protocol RIP receive destination RIP_all_routes - filter action BLOCK set routing control protocol RIP receive destination RIP_all_routes - address match type PREFIX, - domain {{ routing network protocol IP domain DEFAULT_ROUTE_DOMAIN }} ! >create routing control protocol RIP propagate destin DEFAULT_ROUTE_to_RIP - > filter action PASS >set routing control protocol RIP propagate destin DEFAULT_ROUTE_to_RIP - > address match type EXACT, - > domain {{ routing network protocol IP dom DEFAULT_ROUTE_DOMAIN }}, - > sources {{ routing control protocol LOCAL }} ! create routing control protocol RIP propagate destin ISLevel1_to_RIP - filter action PASS set routing control protocol RIP propagate destination ISLevel1_to_RIP - address match type PREFIX, - domain {{ routing network protocol IP dom DEFAULT_ROUTE_DOMAIN }}, - sources {{ routing control protocol IS-ISLevel1 }} ! ! create routing control prot IS-ISlevel2 prop destin STATIC_to_ISLevel2I - filter action PASS set routing control protocol IS-ISlevel2 prop destin STATIC_to_ISLevel2I - address match type PREFIX, - domain {{ routing network protocol IP domain STATIC_ROUTES_DOMAIN }}, - sources {{ routing control protocol STATIC }}, - announce route attributes { ISIS Internal } ! create routing control prot IS-ISlevel2 prop destin STATIC_to_ISLevel2E - filter action PASS set routing control protocol IS-ISlevel2 prop destin STATIC_to_ISLevel2E - address match type PREFIX, - domain {{ routing network protocol IP dom STATIC_ROUTES_DOMAIN }}, - sources {{ routing control protocol STATIC }}, - announce route attributes { ISIS External } ! create routing control protocol RIP propagate destin ISLevel2I_to_RIP - filter action PASS, - source route attributes { ISIS Internal } set routing control protocol RIP propagate destination ISLevel2I_to_RIP - address match type PREFIX, - domain {{ routing network protocol IP domain DEFAULT_ROUTE_DOMAIN }}, - sources {{ routing control protocol IS-ISLevel2 }} ! create routing control protocol RIP propagate destin ISLevel2E_to_RIP - filter action PASS, - source route attributes { ISIS External } set routing control protocol RIP propagate destination ISLevel2E_to_RIP - address match type PREFIX, - domain {{ routing network protocol IP dom DEFAULT_ROUTE_DOMAIN }}, - sources {{ routing control protocol IS-ISLevel2 }} ! create routing control protocol RIP propagate destination STATIC_to_RIP - filter action PASS set routing control protocol RIP propagate destination STATIC_to_RIP - address match type PREFIX, - domain {{ routing network protocol IP dom STATIC_ROUTES_DOMAIN }}, - sources {{ routing control protocol STATIC }} ! enable routing network protocol IP enable routing control protocol RIP enable routing control protocol RIP receive destination RIP_all_routes enable routing control protocol RIP propagate destin DEFAULT_ROUTE_to_RIP enable routing control protocol RIP propagate destination ISLevel1_to_RIP enable routing control protocol IS-ISlevel2 prop destin STATIC_to_ISLevel2I enable routing control protocol IS-ISlevel2 prop destin STATIC_to_ISLevel2E enable routing control protocol RIP propagate destination ISLevel2I_to_RIP enable routing control protocol RIP propagate destination ISLevel2E_to_RIP enable routing control protocol RIP propagate destination STATIC_to_RIP
3617.3		MARVIN::PATEL		`Tue Apr 29 1997 12:57`	3
	I have an old management guide (version 3.0) that has a section 9.5.4 - 'Advertising a Default Route'. This should be present in the current versions of the manual.
3617.4	Change of section no. for V4	LINGO::SILVERMAN		`Wed Apr 30 1997 04:52`	11
	<<< Note 3617.3 by MARVIN::PATEL >>> >I have an old management guide (version 3.0) that has a section 9.5.4 - >'Advertising a Default Route'. This should be present in the current >versions of the manual. For V4.0, the section is 11.7.4. Marge Silverman DECNIS technical writer
3617.5		BRSADV::PACCO	Horum omnium fortissimi sunt Belgae	`Wed Apr 30 1997 06:20`	16
	Here the required NCL commands: create routing control protocol RIP type IP RIP set routing control protocol RIP RIP state send only ! create routing control protocol RIP propagate dest DEFAULT_ROUTE_to_RIP - filter action PASS set routing control protocol RIP propagate dest DEFAULT_ROUTE_to_RIP - address match type EXACT, - sources {{ routing control protocol LOCAL }} Note: I had to OMIT the 'domain' attribute in the set command !!! Thanks Jitu !