Router Stack??
in [Cisco]
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From: J.Cottingim on 5 May 2008 01:12 On May 2, 8:15 pm, hhs <hamsovann...(a)gmail.com> wrote: > On May 2, 5:10 pm, Sam Wilson <Sam.Wil...(a)ed.ac.uk> wrote: > > > > > In article > > <dbf8d992-e9ef-460d-9d53-aad654332...(a)h1g2000prh.googlegroups.com>, > > > hhs <hamsovann...(a)gmail.com> wrote: > > > On May 2, 4:19 pm, Sam Wilson <Sam.Wil...(a)ed.ac.uk> wrote: > > > > In article > > > > <91fe4865-26db-457f-a2d6-9ba110810...(a)q24g2000prf.googlegroups.com>, > > > > > Things you can consider are adding more interfaces to a modular router, > > > > buying a larger modular chassis and reusing your interfaces, > > > > daisychaining routers together, or just buying a bigger router. More > > > > information on what kind of router(s) you have already and the number > > > > and type of interfaces would let people provide better advice. > > > > Buying a larger modular chassis mean like buying a new routers, right? > > > What do you mean daisy chaining router? Now i have 2651 which have 2 > > > WIC. (now already use all of 4 interface - 2x WIC-2T). Please advise. > > > If I read the specs right the 2651 has 1 or 2 fast ethernet ports, 1 > > network module slot and 2 WIC slots. You don't mention the NM slot but > > if you're not using that already you can get an NM-2W module to give you > > two more WIC slots into which you may be able to put WIC-2Ts. It looks > > as though the 2651 doesn't support the NM-4T card, directly. > > > The 2600 series is end of life and you can't get them any more, but > > replacing the chassis would involve getting another router (2800 or 3800 > > series) into which you could put the same WICs or an NM-4T (a second > > hand 2691 would handle the NM-4T too, apparently). Alternatively you > > could buy a second router and connect it to the first using one of the > > ethernet ports - that's what I mean by daisychaining. > > > Without just a little more detail of which 2651 model (plain or XM) and > > what the interfaces are used for it's difficult to say more. > > > Hope that helps. > > > Sam > > I haven't use the Network Module slot yet.The fact is, I don't know > that it can use to provide WIC. Thanks for your information. I will > check out NM-2W. > > Thanks you guys alot :) HHS is just trying to find a solution to the lack of interfaces... His original question about "stacking" seems to point me to simply putting another router on the same subnet and use a routing protocol to transfer information about which interface to forward the traffic. There's no need to replace or upgrade the current router... just put in another router that suits your needs and implement any of the many routing protocols available. (I suggest EIGRP for it's ease and flexibility) So in this sense, "stacking" of routers is completely possible. One thought on this however, you'll want to pay more attention to future-proofing your solutions. i.e. the next router you put in, plan for expansion. -JC
From: hhs on 5 May 2008 03:05 On May 5, 12:12 pm, "J.Cottingim" <jcottin...(a)yahoo.com> wrote: > On May 2, 8:15 pm, hhs <hamsovann...(a)gmail.com> wrote: > > > > > On May 2, 5:10 pm, Sam Wilson <Sam.Wil...(a)ed.ac.uk> wrote: > > > > In article > > > <dbf8d992-e9ef-460d-9d53-aad654332...(a)h1g2000prh.googlegroups.com>, > > > > hhs <hamsovann...(a)gmail.com> wrote: > > > > On May 2, 4:19 pm, Sam Wilson <Sam.Wil...(a)ed.ac.uk> wrote: > > > > > In article > > > > > <91fe4865-26db-457f-a2d6-9ba110810...(a)q24g2000prf.googlegroups.com>, > > > > > > Things you can consider are adding more interfaces to a modular router, > > > > > buying a larger modular chassis and reusing your interfaces, > > > > > daisychaining routers together, or just buying a bigger router. More > > > > > information on what kind of router(s) you have already and the number > > > > > and type of interfaces would let people provide better advice. > > > > > Buying a larger modular chassis mean like buying a new routers, right? > > > > What do you mean daisy chaining router? Now i have 2651 which have 2 > > > > WIC. (now already use all of 4 interface - 2x WIC-2T). Please advise. > > > > If I read the specs right the 2651 has 1 or 2 fast ethernet ports, 1 > > > network module slot and 2 WIC slots. You don't mention the NM slot but > > > if you're not using that already you can get an NM-2W module to give you > > > two more WIC slots into which you may be able to put WIC-2Ts. It looks > > > as though the 2651 doesn't support the NM-4T card, directly. > > > > The 2600 series is end of life and you can't get them any more, but > > > replacing the chassis would involve getting another router (2800 or 3800 > > > series) into which you could put the same WICs or an NM-4T (a second > > > hand 2691 would handle the NM-4T too, apparently). Alternatively you > > > could buy a second router and connect it to the first using one of the > > > ethernet ports - that's what I mean by daisychaining. > > > > Without just a little more detail of which 2651 model (plain or XM) and > > > what the interfaces are used for it's difficult to say more. > > > > Hope that helps. > > > > Sam > > > I haven't use the Network Module slot yet.The fact is, I don't know > > that it can use to provide WIC. Thanks for your information. I will > > check out NM-2W. > > > Thanks you guys alot :) > > HHS is just trying to find a solution to the lack of interfaces... His > original question about "stacking" seems to point me to simply putting > another router on the same subnet and use a routing protocol to > transfer information about which interface to forward the traffic. > > There's no need to replace or upgrade the current router... just put > in another router that suits your needs and implement any of the many > routing protocols available. (I suggest EIGRP for it's ease and > flexibility) So in this sense, "stacking" of routers is completely > possible. > > One thought on this however, you'll want to pay more attention to > future-proofing your solutions. i.e. the next router you put in, plan > for expansion. > > -JC Hello, So what about the performance? Among the two option: 1. get network module and WAN interface card 2. put another router and use routing protocol to transfer or forward traffic (is it like add other hop? Will this increase delay) Thanks, hhs
From: Roadrunner on 4 May 2008 10:18 The NM-2W will give you 2 additional WIC slots which should allow you you install 2 additioal WIC-2T's if you wanted. "hhs" <hamsovannary(a)gmail.com> wrote in message news:6958fe2b-50e6-49f2-a0d6-5d58e78894ad(a)x19g2000prg.googlegroups.com... > On May 2, 5:10 pm, Sam Wilson <Sam.Wil...(a)ed.ac.uk> wrote: >> In article >> <dbf8d992-e9ef-460d-9d53-aad654332...(a)h1g2000prh.googlegroups.com>, >> >> hhs <hamsovann...(a)gmail.com> wrote: >> > On May 2, 4:19 pm, Sam Wilson <Sam.Wil...(a)ed.ac.uk> wrote: >> > > In article >> > > <91fe4865-26db-457f-a2d6-9ba110810...(a)q24g2000prf.googlegroups.com>, >> >> > > Things you can consider are adding more interfaces to a modular >> > > router, >> > > buying a larger modular chassis and reusing your interfaces, >> > > daisychaining routers together, or just buying a bigger router. More >> > > information on what kind of router(s) you have already and the number >> > > and type of interfaces would let people provide better advice. >> >> > Buying a larger modular chassis mean like buying a new routers, right? >> > What do you mean daisy chaining router? Now i have 2651 which have 2 >> > WIC. (now already use all of 4 interface - 2x WIC-2T). Please advise. >> >> If I read the specs right the 2651 has 1 or 2 fast ethernet ports, 1 >> network module slot and 2 WIC slots. You don't mention the NM slot but >> if you're not using that already you can get an NM-2W module to give you >> two more WIC slots into which you may be able to put WIC-2Ts. It looks >> as though the 2651 doesn't support the NM-4T card, directly. >> >> The 2600 series is end of life and you can't get them any more, but >> replacing the chassis would involve getting another router (2800 or 3800 >> series) into which you could put the same WICs or an NM-4T (a second >> hand 2691 would handle the NM-4T too, apparently). Alternatively you >> could buy a second router and connect it to the first using one of the >> ethernet ports - that's what I mean by daisychaining. >> >> Without just a little more detail of which 2651 model (plain or XM) and >> what the interfaces are used for it's difficult to say more. >> >> Hope that helps. >> >> Sam > > > I haven't use the Network Module slot yet.The fact is, I don't know > that it can use to provide WIC. Thanks for your information. I will > check out NM-2W. > > Thanks you guys alot :)
From: Sam Wilson on 5 May 2008 10:06 In article <ff47587e-1e85-4aea-a3ea-b3e00184a7ea(a)l64g2000hse.googlegroups.com>, "J.Cottingim" <jcottingim(a)yahoo.com> wrote: > HHS is just trying to find a solution to the lack of interfaces... His > original question about "stacking" seems to point me to simply putting > another router on the same subnet and use a routing protocol to > transfer information about which interface to forward the traffic. > > There's no need to replace or upgrade the current router... just put > in another router that suits your needs and implement any of the many > routing protocols available. (I suggest EIGRP for it's ease and > flexibility) So in this sense, "stacking" of routers is completely > possible. Whether that was indeed the case was the kind of information I was fishing for initially. Since his (apparently obsolete) router has space for more interfaces a second router may or may not be the appropriate way to go. Depending on how his routers are connected and how his network is monitored use of a dynamic routing protocol may be overkill. > One thought on this however, you'll want to pay more attention to > future-proofing your solutions. i.e. the next router you put in, plan > for expansion. Or just budget for it. Sam
From: Sam Wilson on 5 May 2008 10:11
In article <82186961-8017-430b-a1fc-bd68578d5a91(a)l17g2000pri.googlegroups.com>, hhs <hamsovannary(a)gmail.com> wrote: > So what about the performance? Among the two option: > 1. get network module and WAN interface card > 2. put another router and use routing protocol to transfer or forward > traffic (is it like add other hop? Will this increase delay) We can't comment on performance unless we know the type and quantity of traffic on your network and the how the rest of it is configured. What speed are the links to your outlying routers and what is on the end of them? Is there some kind of uplink from your central router and what is its speed? What are the distances involved? Sam |