bpadda
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Minimum CIR Required for TCP/IP
Can you tell me what is the minimum CIR on Frame Relay that is required for:
a) TCP/IP
b) MPLS switching
c) VPN's
a) TCP/IP
b) MPLS switching
c) VPN's
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zero :)
Earth to bpadda . . .
In theory? ~9600 for TCP/IP, not quite sure on MPLS, and VPN would be around 14,400. In practice? I'd recommend around 768k for a useable setup with MPLS & a VPN.
It all to do with header and frame size. CIR must account for PAYLOAD and well as HEADER.
Therefore if still matters the TRAFFIC you will send, and not what flavour (VPN, MPLS, TCP/IP)
You need to estimate what traffic you will be sending, then look at about 5-10% more for the VPN headers (depends on if your using IPSEC over MPLS, or simply using MPLS which is a VPN technology in it self.
From working with major Telco's, get a small CIR ie 16K but get a large EIR 64K. This works out much cheaper than 32k CIR and 64K EIR. You should get most of the time up to the 64K anyway, particularly if the passport switch for the NTU is not in heavly use by other customer.
This should be enough for an office of about 20 people using the network moderately for email and general web browsing (no large downloads). You can then use MRTG or get IT advise to monitor the Bandwidth, and upgrade the CIR as required (or throttle down the downloads etc. to avoid congestion)
Therefore if still matters the TRAFFIC you will send, and not what flavour (VPN, MPLS, TCP/IP)
You need to estimate what traffic you will be sending, then look at about 5-10% more for the VPN headers (depends on if your using IPSEC over MPLS, or simply using MPLS which is a VPN technology in it self.
From working with major Telco's, get a small CIR ie 16K but get a large EIR 64K. This works out much cheaper than 32k CIR and 64K EIR. You should get most of the time up to the 64K anyway, particularly if the passport switch for the NTU is not in heavly use by other customer.
This should be enough for an office of about 20 people using the network moderately for email and general web browsing (no large downloads). You can then use MRTG or get IT advise to monitor the Bandwidth, and upgrade the CIR as required (or throttle down the downloads etc. to avoid congestion)
G'day, bpadda
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There has been no activity on the question for 138 days, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area for this question:
RECOMMENDATION: Points awarded to: SteveJ
If you would like to keep this question open for more expert input, this cleanup effort will get it closer to the top of the list where it will get more visibility for the experts.
if there is any objection or other expert commentary to this recommendation then please post in here within 7 days.
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Thanks,
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