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| Author |
Message |
Bob Simon
Guest
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 Posted: Mon Aug 20, 2007 1:42 am Post subject: Router to Connect VLANs |
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I want to segment a network into two VLANs and use ACLs to control
admitted traffic. High performance is not an issue but cost of
equipment is.
Do all modern Cisco routers support 802.1Q and access lists?
What is the benefit of having two ethernet interfaces or will a
"router on a stick" design work just as well? |
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Trendkill
Guest
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| Posted: Mon Aug 20, 2007 1:52 am Post subject: Re: Router to Connect VLANs |
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On Aug 19, 4:42 pm, Bob Simon <nob...@nowhere.com> wrote:
| Quote: | I want to segment a network into two VLANs and use ACLs to control
admitted traffic. High performance is not an issue but cost of
equipment is.
Do all modern Cisco routers support 802.1Q and access lists?
What is the benefit of having two ethernet interfaces or will a
"router on a stick" design work just as well?
|
Technically, a router on a stick will function in the exact same way.
The issue to be cognizant of is bandwidth. When you use a router on a
stick, you will have a single 100 meg or gig interface for any traffic
going in/out of both vlans. When you have a router with two
interfaces, they can operate indepedently, particularly if you have a
large WAN or a significant portion of the network sitting somewhere
else. For small offices, or small networks, routers on a stick are
perfect. For any significant sized networks, they can not be a good
idea since a single communication flow can hammer the backbone (all
trunked vlans). This is also only for inter-vlan
communications....intra vlan is a different story depending on your
architecture. |
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Gabriele Beltrame
Guest
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| Posted: Mon Aug 20, 2007 1:53 am Post subject: Re: Router to Connect VLANs |
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"Bob Simon" <nobody@nowhere.com> ha scritto nel messaggio
news:ueahc31aklgmknfmugjik1shlar73m5g3s@4ax.com...
| Quote: | I want to segment a network into two VLANs and use ACLs to control
admitted traffic. High performance is not an issue but cost of
equipment is.
Do all modern Cisco routers support 802.1Q and access lists?
What is the benefit of having two ethernet interfaces or will a
"router on a stick" design work just as well?
|
Hi,
You could pratically make use of almost cisco every router with a
FastEthernet.
From a performance standpoint if you do not require "top of the class"
performance you could use a "router on a stick" without troubles. (for
example a cisco 26x1[XM] has two FastEthernet ports and it's pretty cheap
but it can't forward/switch at a full 200Mbps line rate).
You could also buy a L3 Switch (more performing and with more "LAN" features
that a "simple" router).
Regards,
Gabriele |
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Arthur Brain
Guest
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| Posted: Mon Aug 20, 2007 4:39 am Post subject: Re: Router to Connect VLANs |
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Gabriele Beltrame wrote:
| Quote: | "Bob Simon" <nobody@nowhere.com> ha scritto nel messaggio
news:ueahc31aklgmknfmugjik1shlar73m5g3s@4ax.com...
I want to segment a network into two VLANs and use ACLs to control
admitted traffic. High performance is not an issue but cost of
equipment is.
Do all modern Cisco routers support 802.1Q and access lists?
What is the benefit of having two ethernet interfaces or will a
"router on a stick" design work just as well?
Hi,
You could pratically make use of almost cisco every router with a
FastEthernet.
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I think I tried it on a 1720 and it didn't work.
Apparently the 1720 doesn't support dot1q.
I was told a 1721 would, though. |
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t0
Guest
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| Posted: Wed Aug 22, 2007 3:39 pm Post subject: Re: Router to Connect VLANs |
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On Aug 19, 10:42 pm, Bob Simon <nob...@nowhere.com> wrote:
| Quote: | I want to segment a network into two VLANs and use ACLs to control
admitted traffic. High performance is not an issue but cost of
equipment is.
Do all modern Cisco routers support 802.1Q and access lists?
What is the benefit of having two ethernet interfaces or will a
"router on a stick" design work just as well?
|
Using two ethernet interfaces will segment your network onto 2 LANs,
therefore no need for VLANs.
The benefit of VLANs is to use one Router interface and create several
sub interfaces to segment your network onto Virtual Local Area
Networks
my 2cts
peace
t0 |
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