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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: router interfaces
Any router with an ATM or Frame Relay interface is going to have lots and lots of sub-interfaces. In provider-customer connections the usual process is to have a /30 and the interface is operating in point-point VC mode. I'm sure folks aggregating onto Frame Relay HSSI from a WAN switch are putting more than 50 T1 worth on. I'd hope not since one is paying for that T1 but oversubscribing is the game. So certainly I would expect to see hundreds of interfaces. I'm not talking about secondary IP addresses. On an OC-3 ATM -- I can certainly trunk lots of customers to a single BCN with 3 OC-3 interfaces (dumping that traffic is another problem unless you want Gigabit Ethernet or multiple Fast Ethernet full-duplex) ----- Original Message ----- From: "Chris Cappuccio" <[email protected]> To: "Andrew Brown" <[email protected]> Cc: <[email protected]> Sent: Monday, April 10, 2000 5:43 PM Subject: Re: router interfaces > > This really depends on what software the router is using and how optimized it > is > > You can easily have thousands of loopback (or other virtual interfaces) on a > PC router running a free OS. The performance you will get depends on how the > OS handles routing tables and interfaces in the kernel!!! > > As far as max next-hop gateways, this should only be limited by the limits of > the routing table. > > On Mon, 10 Apr 2000, Andrew Brown wrote: > > | > | while arguing routing with a friend of mine, we got to the point where > | the number of interfaces on a router was a point of contention. now > | certainly routing depends not only on the number of interfaces a > | router has, but also on the number of next-hop gateways it need to > | keep track of. > | > | that said, i'd like to just ask: what's the largest number of > | interfaces anyone has on any of their routers? i was arguing that > | high end routes would probably have maybe a few hundred. my friend > | was arguing in terms of theoretical limits and thought it was more > | like tens of thousands. > | > | max interfaces? max next-hop gateways? > | > | thanks. > | > | -- > | |-----< "CODE WARRIOR" >-----| > | [email protected] * "ah! i see you have the internet > | [email protected] (Andrew Brown) that goes *ping*!" > | [email protected] * "information is power -- share the wealth." > | > | > > --- > Reverend Chris Cappuccio > http://www.dqc.org/~chris/ > >
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