Re: Question about big Gig E rings
- From: "Thrill5" <nospam@xxxxxxxxxxxxx>
- Date: Thu, 31 May 2007 13:06:26 -0400
SONET is the way to go if you want extremely fast failover detection and
recovery. SONET is will do this in micro-seconds, Ethernet would do this
in less than a minute. Since you have "North" and "South" routes built out,
it looks to me that SONET was the choice when the fiber routes were
engineered. If the plan was using Ethernet, the fiber build-out plan would
be different. For Ethernet, you would have different paths and fewer fibers
would be required, but it would not be a resilient and fail-over would not
be anywhere near as fast. SONET provides virtually no packet loss due to a
fiber break or equipment failure.
Scott
"thcollicutt" <thcollicutt@xxxxxxxxx> wrote in message
news:1180616379.947377.26470@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
We are looking at building a province wide fiber network for
connection of various government offices.
4 hubs - partially meshed
56 pops- one connection to nearest hub, backup connection to next
nearest hub
2-300 sites - connected to neares pop
The hubs and pops are to be connected with gigabit fiber (not low
dispersion). Sites will be connected to the pops by whatever method
makes the most sense for the site. All fiber links are <90Km, and
most <80Km.
Hubs are connected as follows
B ==> 6 fibers via North route ==> C
B ==> 6 fibers via South route ==> C
D ==> 6 fibers via North route ==> C
D ==> 6 fibers via South route ==> C
D ==> 6 fibers ==> B : Regenerated to keep < 90Km
A ==> 6 fibers via North route ==> B
A ==> 6 fibers via South route ==> C : Regenerated to keep < 90Km
(North and south routes connecting to D are different routes than
connecting to A or C, as all are on different rings)
We are considering small server farms at the hub sites, with backup
servers at othe hubs. VoIP might be considered in the near future.
It has been suggested that SONET is the only option that is open to
us, due to the fast redirect of traffic if there is a fiber failure.
I have seen various vendors advertise equipment that would allow
Ethernet to be used, but with what is probably proprietory protocols
or implimentations.
We are looking to combine core government, health care, and the school
system on the same infrastructure. We are looking at the possibility
of VLANs, QinQ, VRF-lite, perhaps CWDM.
Is SONET the solution of choice, or am I correct in thinking that this
can be accomplished using Ethernet? Has anyone used these vendor
solutions for providing resiliency?
.
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