The use of RIPng (was: Re: So why is "IPv4 with longer addresses"a problem anyway?)

George Bonser gbonser at
Tue Jun 1 18:50:54 CEST 2010

> -----Original Message-----
> From:  
> On Behalf Of Mark Tinka
> Sent: Tuesday, June 01, 2010 9:11 AM
> To: Jürgen Becker
> Cc: Benedikt Stockebrand; ipv6-ops at
> Subject: Re: The use of RIPng (was: Re: So why is "IPv4 with longer
> addresses"a problem anyway?)
> On Tuesday 01 June 2010 11:47:44 pm Jürgen Becker wrote:
> > There is one simple reason why RIP is still used and why  it most
> > likely will be used in the future: RIP is  cheaper then OSPF etc.,
> > because most hardware vendor  consider it basic routing and include
> it
> > for free.
> RFC 1812, final paragraph of section 7.2.1:
> 	"A router that implements any routing protocol (other than
> 	 static routes) MUST IMPLEMENT OSPF (see Section [7.2.2]).
> 	 A router MAY implement additional IGPs."
> Of course we all know that what the RFC's suggest and what happens on
> the ground may be vastly apart but I'd be hard- pressed to find a
> decent vendor out there that won't do OSPF in some way or form. Even
> Cisco's 800 series routers will happily do OSPF, and you can pick those
> up off E-Bay for a couple of bucks.
> If you need more horse-power from your router, chances are it supports
> >  For
> >  advanced routing you have to buy licenses and/or more  expensive
> > hardware.
> FUD.
> What we're seeing now is vendors that "were" charging for
> IPv6 since it was considered an "advanced feature". This included
> OSPFv3 (more reason to use IS-IS). However, some vendors have now put a
> US$0.00 cost on IPv6 and its related features, while the rest have
> began dropping back as well.

What do you mean "were"?  If you own Brocade/Foundry SuperX units and want to run v6 layer 3 you need to buy special blades AND pay a premium license fee. Any networks unlucky enough to have purchased any of that kit over the past few years are suddenly feeling this burning sensation on their seat if they are considering v6 migration. I use RIPng only for "next hop" information where I redistribute connected links from my external peering connections among my BGP routers.  Internally we use OSPF.

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