LAN<-->WAN<-->LAN ; L3 switches or Routers??
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Posted by on July 12, 2006, 3:37 am
Please log in for more thread options LAN in the remote place. This also means, there is a WAN in between these 2 LANs and they communicate via this WAN. I would like to know - What is most preferred among 'Routers' and 'L3 switches', which are to be used for routing the messages from the LAN to the other LAN, via the WAN. Could anybody give a rationale behind that choice? Also, I would like to know whether this choice depends on - whether the WAN is our own or 3rd party network? - whether there is only one VLAN, for which some of the machines are kept locally and the other ones remotely | |||||||||||||
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Posted by Merv on July 12, 2006, 5:55 am
Please log in for more thread options It is quite common to use layer 3 switches connected directly to a carrier provided WAN transport as many carrier deliver the WAN via Ethernet.. | |||||||||||||
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Posted by BernieM on July 12, 2006, 6:17 am
Please log in for more thread options True, we traditionally use Frame-Relay WAN between our main office and remote LAN's ... requiring a HSSI at either end ... easilly slotted into a 'router' but we just recently comissioned our first BDSL service which the Telco delivers via an RJ45 Ethernet jack ... so a two Ethernet port router is simple but so is using a 'layer-3 switch'. So something to consider is what hardware you need to interface to the WAN. BernieM | |||||||||||||
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Posted by Merv on July 12, 2006, 6:59 am
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> So something to consider is what hardware you need to interface to the WAN.
This is a good point as while Cisco high-end switches like the 6500 have FLEXWAN card to support more than just Ethernet connectivity this is not the case on their low end switches. So you might need routers and switches depending on the WAN transport options available. | |||||||||||||
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Posted by stephen on July 12, 2006, 4:30 pm
Please log in for more thread options >
> > So something to consider is what hardware you need to interface to the
WAN.
>
> This is a good point as while Cisco high-end switches like the 6500 > have FLEXWAN card to support more than just Ethernet connectivity this > is not the case on their low end switches. this is a good point to mention to the OP that the difference between routers and L3 switches these days is more about marketing and the "bias" in the box design than engineering. originally - routers were basically software, and switches were hardware. now boxes with reasonable performance are usually a "blend" somewhere between those 2 extremes. the rule of thumb is that if all the interfaces are "lan like" - then it probably gets called a switch, and if you are using older style WAN interfaces such as T1 / E1, Frame Relay or ATM it probably is called a router - but as other have said there are exceptions to both of these. >
--
> So you might need routers and switches depending on the WAN transport > options available. > Regards stephen_hope@xyzworld.com - replace xyz with ntl | |||||||||||||
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> It is quite common to use layer 3 switches connected directly to a
> carrier provided WAN transport as many carrier deliver the WAN via
> Ethernet..
>