Re: IP SLA Monitor

excellent info. Thanks.

On Tue, Apr 21, 2009 at 4:53 PM, Larry Hadrava <lhadrava_at_ipexpert.com>wrote:

> *Here is the official Cisco info on this:*
> **
>
>
http://www.cisco.com/en/US/technologies/tk648/tk362/tk920/technologies_qas090
0aecd8017bd5a.html
>
> *Q.* To what extent does Cisco IOS IP SLAs impact CPU utilization or
> memory?
> *A.* As Cisco IOS IP SLAs is a software-based measurement, it does consume
> CPU usage and memory.
> Table 2 illustrates the CPU usage based on 2,000 active operations,
> activated sequentially. The data generated per operation is 10 packets of
64
> byte sizing, with 20ms spacing using the IP SLAs jitter operation. The data
> represents four destinations, activated per one second versus percentage of
> CPU usage in a 12.4 Cisco IOS release.
>
> *Table 2.* Cisco IOS IP SLAs CPU Usage
>
> Operations/ Second
>
> Operations/ Minute
>
> 2620XM
>
> 3725
>
> 7200VXR
>
> NPE-G1
> 4
> 240
> 7
> 2
> 0
>
> The memory used per Cisco IOS IP SLAs operation does vary with different
> Cisco IOS Software releases.
>
> *Table 3.* Cisco IOS IP SLAs Memory Usage
>
> Cisco IOS Software 12.2 and above
>
> UDP Jitter
> < 12KB
>
> UDP Echo
> < 3.5KB
>
> ICMP Echo
> < 3.2 KB
>
>
> Larry Hadrava
> CCIE #12203 CCNP CCNA
> Sr. Support Engineer  IPexpert, Inc.
> URL: http://www.IPexpert.com <http://www.ipexpert.com/>
>
>
> On Tue, Apr 21, 2009 at 4:34 PM, David Prall <dcp_at_dcptech.com> wrote:
>
>> I'd say minimal. I have 10 tracked objects, using 6 ip sla's, with 4 EEM
>> Applet's, and 1 static route using EOT.
>>
>> #sh proc cpu | i SLA
>> 221 17320 2227937 7 0.00% 0.00% 0.00% 0 IP SLAs
>> Event
>> Pr
>>
>> #sh proc 221
>> Process ID 221 [IP SLAs Event Processor], TTY 0
>> Memory usage [in bytes]
>> Holding: 17208, Maximum: 48332, Allocated: 42236, Freed: 6328
>> Getbufs: 0, Retbufs: 0, Stack: 2668/6000
>> CPU usage
>> PC: 8148B528, Invoked: 2227938, Giveups: 1993513, uSec: 7
>> 5Sec: 0.00%, 1Min: 0.00%, 5Min: 0.00%, Average: 0.00%
>> Age: 7864535564 msec, Runtime: 17320 msec
>> State: Waiting for Event, Priority: Normal
>>
>> #sh proc cpu | i Track
>> 92 0 2 0 0.00% 0.00% 0.00% 0 IP Host
>> Track
>> Pr
>> 174 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
>> Track
>> 206 5880 9934593 0 0.00% 0.00% 0.00% 0 Track
>>
>> #sh proc 92
>> Process ID 92 [IP Host Track Process], TTY 0
>> Memory usage [in bytes]
>> Holding: 10244, Maximum: 10496, Allocated: 252, Freed: 252
>> Getbufs: 0, Retbufs: 0, Stack: 8576/9000
>> CPU usage
>> PC: 818FC84C, Invoked: 2, Giveups: 0, uSec: 0
>> 5Sec: 0.00%, 1Min: 0.00%, 5Min: 0.00%, Average: 0.00%
>> Age: 7864659936 msec, Runtime: 0 msec
>> State: Waiting for Event, Priority: Normal
>>
>> #sh proc 174
>> Process ID 174 [EEM ED Track], TTY 0
>> Memory usage [in bytes]
>> Holding: 13976, Maximum: 13976, Allocated: 3732, Freed: 0
>> Getbufs: 0, Retbufs: 0, Stack: 8332/9000
>> CPU usage
>> PC: 80A85968, Invoked: 3, Giveups: 1, uSec: 0
>> 5Sec: 0.00%, 1Min: 0.00%, 5Min: 0.00%, Average: 0.00%
>> Age: 7864632804 msec, Runtime: 0 msec
>> State: Waiting for Event, Priority: Normal
>>
>> #sh proc 206
>> Process ID 206 [Track], TTY 0
>> Memory usage [in bytes]
>> Holding: 7696, Maximum: 42784, Allocated: 690736, Freed: 61972
>> Getbufs: 0, Retbufs: 0, Stack: 3216/6000
>> CPU usage
>> PC: 816C8614, Invoked: 9934668, Giveups: 0, uSec: 0
>> 5Sec: 0.00%, 1Min: 0.00%, 5Min: 0.00%, Average: 0.00%
>> Age: 7864634104 msec, Runtime: 5880 msec
>> State: Waiting for Event, Priority: Normal
>>
>> --
>> http://dcp.dcptech.com
>>
>>
>> > -----Original Message-----
>> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
>> > S Malik
>> > Sent: Tuesday, April 21, 2009 4:01 PM
>> > To: Cisco certification
>> > Subject: IP SLA Monitor
>> >
>> > Is there any impact of "ip sla monitor" on CPU?
>> >
>> > I need to configure some static routes across an EVPL circuit,
>> > therefore I
>> > like to verify end-to-end connectivity.
>> >
>> >
>> > Blogs and organic groups at http://www.ccie.net
>> >
>> > _______________________________________________________________________
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>>
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Received on Tue Apr 21 2009 - 16:55:44 ART