[mpls-linux-general] Benchmarking mpls problems !?
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[mpls-linux-general] Benchmarking mpls problems !?
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From: Sasa P. <sas...@fe...> - 2005-03-14 09:52:46
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Did anyone tested MPLS network with netperf, netpipe, ping or some other
network tool, becouse I had some problems with measuring MPLS throughput
and round-trip-time.
Network:
Source Ingress
Ingress Destination
Egress
Egress
--------- --------- --------- ---------
--------- --------- ---------
| ip
|--------|ip/mpls|--------|ip/mpls|--------|ip/mpls|--------|ip/mpls|--------|ip/mpls|-------
| ip |
| node | | node 1| | node 2| | node 3| |
node 4| | node 5| | node |
--------- --------- --------- ---------
--------- --------- ---------
| |
|
| |
|
| |
|
--------- ---------
---------
|ip/mpls|-------------------------|ip/mpls|-------------------------|ip/mpls|
| node 6| | node 7|
| node 8|
--------- ---------
---------
All nodes are connected with 100 Mbps links.
I try to compare IP and MPLS throughput and RTT, but I got odd results.
For IP throughput between Source and Destination with netperf, I got
approximately 90 Mbps over 1,2,3,4 and 5 mpls node, but for MPLS
throughput with same tool I got only 350 kbps.
When I ping (ping -qfc 10000 -s 8 dest_ip) Destination from Source, for
MPLS I got 100 times bigger min/avg/max RTT resutls then for IP. But
for MPLS is faster total ping time then for IP.
One more problem: Why IP TTL is decrementing when transmitting thruogh
MPLS network. I think that IP TTL must be unchanged in MPLS network.
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