[c-nsp] Is this throughput on ATM DS3 in 3640 normal?

[Peter Olsson]

One of our customers has offices in two towns. They have a
T3 link between these offices. They use the equipment below,
with lots of free RAM and only using about 60-70% of the cpu
during traffic peaks. There are no errors on the interfaces
and although there are some output drops they seem to few to
be of relevance (one router has 2545 output drops in 7 weeks
and the other has 8750 output drops in 1 week).

They get about 40 Mbps when they only push traffic in one direction.
When they try duplex traffic they can't get higher than about 34 Mbps
in one direction and about 27 Mbps in the other.
Are these numbers normal?

Both routers run ip cef and ospf. No policy routing or access lists or
anything else, just plain routing.

The router in town A has two active FastEthernet, two active Serial
plus the DS3. The router in town B has one active FastEthernet plus
the DS3.

Town A:
cisco 3640 (R4700) processor (revision 0x00) with 123904K/7168K bytes of memory.
System image file is "flash:c3640-is-mz.123-15"
* NM-2FE2W Port adapter, 2 ports
* Serial 2T (12in1)
* Serial 1T WAN daughter card
* ATM DS3 Port adapter, 1 port
 	Hardware Revision        : 1.0
 	Board Revision           : D0
 	Product (FRU) Number     : NM-ATM-DS3

Town B:
cisco 3640 (R4700) processor (revision 0x00) with 123904K/7168K bytes of memory.
System image file is "flash:c3640-is-mz.123-15"
* NM-1FE2W Port adapter, 1 port
* ATM DS3 Port adapter, 1 port
 	Hardware Revision        : 1.0
 	Board Revision           : D0
 	Product (FRU) Number     : NM-ATM-DS3

Thanks!

-- 
Peter Olsson                    pol at leissner.se