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Re: IXP hardware
On Fri, 08 Mar 2002 00:38:54 +0100 "Americo F. Muchanga" wrote:
> A typical 2600 router how much would cost today? some isps will be able
> to plug directly to the switch as they will have an ethernet link, could
> those have their router in their premises, or you think it should be
> better to have the router located in the ix premises?
I have no idea what a 2600 costs these days - talk to your friendly
Cisco rep.
If you allow the ethernet to go off-site (keep in mind that the
max length of a cat5 run is 100 meters - also, you must keep it
in-building for electrical safety reasons), then you can allow
them to jack directly in their own router.
You may want to start off with a small switch in that case however,
as otherwise *all* traffic passes off to that far-away ethernet drop,
and who knows what happens with it (they may attach sniffers after all).
If it's small cisco's at the IXP itself, you can keep an eye over
what they connect to the hub; if the traffic goes a lot further,
then a switch may be better.
In the past, Cisco has helped setting up these facilities;
I don't know what the possibilities are today.
I'll email a few pointers privately.
Geert Jan
>
> rgds, a./
>
>
> Geert Jan de Groot wrote:
>
> >On Thu, 07 Mar 2002 11:24:56 -0800 Randy Bush wrote:
> >
> >>>how can I connect those ISP's over a leased line to the switch at the IXP?
> >>>
> >>usually the isps each has their own router next to the l2 switch, and
> >>each is responsible to bring connectivity to that router.
> >>
> >
> >In addition to Randy's excellent answer, I should add that you don't
> >need to go wild-hog with the central switch equipment. The predecessor
> >to AMS-IX (the Amsterdam exchange) used a piece of 10-BASE5
> >('thick ethernet', you know, the gardenhose cable with the need
> >to drill holes to place a vampire tap on the cable), that ran
> >between three physically-connected buildings that happened to
> >house the exchange users at that time.
> >
> >At that time, the aggregate bandwith brought to the IX was much less
> >than 10 mbit and hence 10mbit/sec was quite sufficient.
> >They upgraded to something fancier when people started bringing in
> >multiple T1's, but that was much later in the game.
> >
> >In your case, in the beginning, a simple 10mbit hub might be sufficient.
> >Heck, Randy has given those away at previous AFNOG meetings...
> >
> >Later, as traffic increases, you can go for 100BASE-TX (100 mbit),
> >switched, and what-have you. At that time, you hopefully also will
> >have the resources to pay for that kind of equipment.
> >
> >Each ISP would bring his own router, preferrably something that
> >can carry a full routing table but you might be able to get started
> >with 2500-style boxes if there are only a few routes to swap.
> >
> >Every ISP also administers his own box. The IXP assigns IP addresses,
> >and probably should maintain a list of who-is-who (name of party,
> >IP address, ASN and peering contact info), but that's enough to
> >get started. A pile of 2600's with a hub will be a fine starting point.
> >
> >Experience has learned that a shared, level3 device in the middle
> >is a mistake. Keep it simple, keep the IXP a layer2 thing.
> >
> >Do label everything right from the start. Cables, boxes, everything.
> >Keep in mind that you'll be working closely together with others
> >and you don't want to mess with the wrong cable.
> >
> >[People will argument that a hub allows sniffing. Sniffing on a router
> >is difficult and besides, I assume the IXP will be occupied by adults]
> >
> >Go for it!
> >
> >Geert Jan
> >
> >
> >-----
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> >
> >
>
>
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> Geert,<br>
> <br>
> A typical 2600 router how much would cost today? some isps will be able to
> plug directly to the switch as they will have an ethernet link, could those
> have their router in their premises, or you think it should be better to
> have the router located in the ix premises?<br>
> <br>
> rgds, a./<br>
> <br>
> <br>
> Geert Jan de Groot wrote:<br>
> <blockquote type="cite" cite="mid:200203072221.g27ML9320440 at berserkly.bsdi.co
m">
> <pre wrap="">On Thu, 07 Mar 2002 11:24:56 -0800 Randy Bush wrote:<br></pre
>
> <blockquote type="cite">
> <blockquote type="cite">
> <pre wrap="">how can I connect those ISP's over a leased line to the sw
itch at the IXP?<br></pre>
> </blockquote>
> <pre wrap="">usually the isps each has their own router next to the l2
switch, and<br>each is responsible to bring connectivity to that router. <br><
/pre>
> </blockquote>
> <pre wrap=""><!----><br>In addition to Randy's excellent answer, I shou
ld add that you don't<br>need to go wild-hog with the central switch equipment.
The predecessor<br>to AMS-IX (the Amsterdam exchange) used a piece of 10-BASE5
<br>('thick ethernet', you know, the gardenhose cable with the need<br>to dril
l holes to place a vampire tap on the cable), that ran<br>between three physica
lly-connected buildings that happened to<br>house the exchange users at that ti
me.<br><br>At that time, the aggregate bandwith brought to the IX was much less
<br>than 10 mbit and hence 10mbit/sec was quite sufficient.<br>They upgraded to
something fancier when people started bringing in<br>multiple T1's, but that w
as much later in the game.<br><br>In your case, in the beginning, a simple 10mb
it hub might be sufficient.<br>Heck, Randy has given those away at previous AFN
OG meetings...<br><br>Later, as traffic increases, you can go for 100BASE-TX (1
00 mbit),<br>switched, and what-have you. A
> t that time, you hopefully also will<br>have the resources to pay for that ki
nd of equipment.<br><br>Each ISP would bring his own router, preferrably someth
ing that<br>can carry a full routing table but you might be able to get started
<br>with 2500-style boxes if there are only a few routes to swap.<br><br>Every
ISP also administers his own box. The IXP assigns IP addresses,<br>and probably
should maintain a list of who-is-who (name of party,<br>IP address, ASN and pe
ering contact info), but that's enough to<br>get started. A pile of 2600's with
a hub will be a fine starting point.<br><br>Experience has learned that a shar
ed, level3 device in the middle<br>is a mistake. Keep it simple, keep the IXP a
layer2 thing.<br><br>Do label everything right from the start. Cables, boxes,
everything.<br>Keep in mind that you'll be working closely together with others
<br>and you don't want to mess with the wrong cable.<br><br>[People will argume
nt that a hub allows sniffing. Sniffing on a
> router<br>is difficult and besides, I assume the IXP will be occupied by adu
lts]<br><br>Go for it!<br><br>Geert Jan<br><br><br>-----<br>This is the afnog m
ailing list, managed by Majordomo 1.94.5<br><br>To send a message to this list,
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> </blockquote>
> <br>
> </body>
> </html>
>
> --------------060604010308090901030708--
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>
> -----
> This is the afnog mailing list, managed by Majordomo 1.94.5
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