[cisco-bba] Real life experience with NPE-G1 aggregation numbers

[Heiner Lante]

Hi Dennis,

here it is a sample from one of our routers:

At the moment on that router are 906 L2TP connections.

POS1/0
5 minute input rate 36500000 bits/sec, 12622 packets/sec
5 minute output rate 58245000 bits/sec, 12742 packets/sec

Gigabit 0/1
5 minute input rate 53876000 bits/sec, 12452 packets/sec
5 minute output rate 32639000 bits/sec, 12340 packets/sec

CPU utilization for five seconds: 38%/35%; one minute: 42%; five minutes: 42%

We are also running BGP on all routers together with policy routing and OSPF.

Heiner

At 23:01 Uhr -0700 03.08.2004, Dennis Peng wrote:
>Heiner Lante [hl at kamp.de] wrote:
>>  Hi,
>>
>>  could you please give me a idea, how much traffic you have on that boxes?
>>
>>  Our experience is, that the npe1g can handle up
>>  to 120 Mbit in/and 70 Mbit on the interface to
>>  the customers with up to 1500 sessions. With that
>>  traffic the cpu load goes up to 60 - 70%.
>
>How many packets per second is this? PPS is generally a more
>comparable measure then bit/sec since the average packet size varies
>across networks.
>
>Dennis
>
>>  The higher the traffic, the higher the load of
>>  the boxes. If there is very less traffic, you can
>>  handle much more of l2tp sessions.
>>
>>  We have decided to add a new npe1g for every 100
>>  - 120 Mbit outboundtraffic per Box.
>>
>>  Regards Heiner
>>
>>  At 13:47 Uhr +0200 03.08.2004, Raymond Huber wrote:
>>  >
>>  >Hi,
>>  >
>>  >We have 2 NPE-G1 in 7204 VXR which terminating pppoe and l2tp. 512MB Memory
>>  >At the moment they are handle around 4000 PPPoE Session on 290 L2TP Tunnels
>>  >at around 17% CPU load.
>>  >
>>  >The same amount of sessions are on the second stack of 7301 which also have
>>  >the same Processor and a Memory of 1GB.
>>  >The CPU load is 6% higher.
>>  >
>>  >So the CPU load is hardly related to the IOS Image which is running.
>>  >
>>  >Ok. To your question:
>>  >
>>  >Once we testet at around 7000 PPPoE Sessions 250 L2TP Tunnels with a load
>>  >of
>>  >58% , this was a 7301 Router. So it seams, that the 16k Sessions are not
>>  >possible for our environment.
>>  >
>>  >Cheers
>>  >Raymond
>>  >
>>  >-----Urspr?ngliche Nachricht-----
>>  >Von: cisco-bba-bounces at puck.nether.net
>>  >[mailto:cisco-bba-bounces at puck.nether.net] Im Auftrag von Paul Grehan
>>  >Gesendet: Dienstag, 3. August 2004 13:03
>>  >An: cisco-bba at puck.nether.net
>>  >Betreff: [cisco-bba] Real life experience with NPE-G1 aggregation numbers
>>  >
>>  >Hi All,
>>  >
>>  >Just wondering if anyone's got some first hand experience with large
>>  >termination numbers for the NPE-G1 processor ??
>>  >
>>  >16K seems to be an idylic number of PPP sessions (PPPoVPDN, PPPoE &
>>  >PPPoA)...
>>  >
>>  >Thks,
>>  >
>>  >-Paul
>>  >
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