<br><br><div><span class="gmail_quote">On 1/25/07, <b class="gmail_sendername">Arie Vayner</b> <<a href="mailto:ariev@vayner.net">ariev@vayner.net</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Anthony,<br><br>The high CPU on IP Input is normal, as this is where the L2TP work is being done.<br>Also note that you have a high rate of CPU being used in Interrupts (91%/44% means that 44% is used for Interrupts). Interrupts on Cisco routers are usually linked directly to a high rate of traffic (on centralized CPU devices).
<br>I would assume you box is very close to its limit of how much traffic it can handle. Could you please send some of the "show interface" outputs (for the FastEthernet/GigE/ATM ports you might have). This would allow us to get a better estimation.
<br><br>You need to take into account that this is a centralized CPU platform, and all traffic is handled by the CPU. This means that the scale factor is not only a question of how many sessions you have concurrently, but also how much traffic (mostly in PPS and not BPS) they transmit.
<br><br>Thanks<br><span class="sg">Arie</span><div><span class="e" id="q_110583013859d0e2_2"><br><br><div><span class="gmail_quote">On 1/25/07, <b class="gmail_sendername">Anthony Law</b> <<a href="mailto:antnada@hotmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
antnada@hotmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><br>Dear all<br>
<br>
Thank you for all of your input. I configured vpdn ip udp ignore checksum<br>
& I have corrected a mis-config on our radius server (passing compression attribute to cisco) now that the L2TP data daemon is running normal, but I am still facing high cpu on Pool Manager & IP Input<br>
anymore suggestions?<br>
<br>
<br>
CPU utilization for five seconds: 91%/44%; one minute: 91%; five minutes: 86%<br> PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process <br> 1 4 175 22 0.00% 0.00% 0.00% 0 Chunk Manager
<br> 2 487964 5014024 97 0.00% 0.00% 0.00% 0 Load Meter <br> 3 1606476 870141 1846 0.00% 0.00% 0.00% 0 CEF Scanner <br> 4 22428792 3318958 6757 0.00% 0.06%
0.05% 0 Check heaps <br> 5 481842360 102963163 4679 9.05% 9.70% 7.90% 0 Pool Manager <br> 37 11275060121049358292 1074 36.02% 35.07% 32.40% 0 IP Input <br><br>Thank You<br>
<br>
Anthony<br><br><br><br>
<hr>
<br>
> Date: Wed, 24 Jan 2007 02:37:10 +0200<br>> From: <a href="mailto:nitzan.tzelniker@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">nitzan.tzelniker@gmail.com</a><br>> To: <a href="mailto:antnada@hotmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
antnada@hotmail.com</a><br>> Subject: Re: [cisco-bba] need help on troubleshooting high cpu on 7206 NPE300 LNS<br>> CC: <a href="mailto:cisco-bba@puck.nether.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
cisco-bba@puck.nether.net</a><br>> <br>> You can try<br>> <br>> vpdn ip udp ignore checksum<br>> <br>> Nitzan<br>> <br>> On 1/24/07, Anthony Law <<a href="mailto:antnada@hotmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
antnada@hotmail.com</a>> wrote:<br>> > Dear all,<br>> ><br>> > We have a 7206 w/NPE300 running as a LNS terminating pppoe sessions from our<br>> > telco. We are concurrently running around 360 pppoe sessions.
<br>> ><br>> > Recently. I noticed that our 7206 is having extremely high cpu, at times<br>> > going to 100%, please see below<br>> ><br>> > CPU utilization for five seconds: 99%/42%; one minute: 99%; five minutes:
<br>> > 99%<br>> > PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process<br>> > 1 0 75 0 0.00% 0.00% 0.00% 0 Chunk Manager<br>> ><br>> ><br>> > 5 472509060 101324023 4663 7.65% 8.80%
8.84% 0 Pool Manager<br>> ><br>> > 37 10810547881019294234 1060 22.79% 25.16% 25.51% 0 IP Input<br>> ><br>> ><br>> > 101 705044020 800103660 881 18.89% 21.35% 19.34% 0 L2TP data<br>> > daemon
<br>> > 102 53153196 10197928 5212 2.19% 0.46% 0.45% 0 L2TP mgmt<br>> > daemon<br>> ><br>> ><br>> > It seemed that Pool Manager + IP Input + L2TP data daemon together is<br>> > causing this issue. I was searching for documents regarding this on google
<br>> > and came to this mailing list. I am wondering if you guys can help me out by<br>> > identifying the mis-configuration that I have on my end as it is my<br>> > understanding that a 7206 should at least take close 1000 pppoe sessions.
<br>> > Thank You in advance for your input.<br>> ><br>> ><br>> > hostname LNS<br>> > !<br>> > boot system slot1:c7200-is-mz.122-32.bin<br>> > boot system slot1:c7200-is-mz.120-3.T3
<br>> > aaa new-model<br>> > aaa authentication login default local<br>> > aaa authentication login no_rad line<br>> > aaa authentication ppp default group radius local<br>> > aaa authentication ppp vpdn group radius
<br>> > aaa authorization network default group radius<br>> > aaa authorization configuration default group radius<br>> > aaa accounting delay-start<br>> > aaa accounting exec default start-stop group radius
<br>> > aaa accounting network default start-stop group radius<br>> > enable secret 5 XXXXXXXXXXXXXXXXXXXXXXXXXXX<br>> > !<br>> > clock timezone EST -5<br>> > clock summer-time EDT recurring
<br>
> > ip subnet-zero<br>> > no ip source-route<br>> > ip cef<br>> > !<br>> > !<br>> > ip name-server XXXXXX<br>> > ip name-server XXXXXX<br>> > ip name-server XXXXXX<br>> > !
<br>> > vpdn enable<br>> > !<br>> > vpdn-group XXXXXXXX<br>> > accept-dialin<br>> > protocol l2tp<br>> > virtual-template 1<br>> > terminate-from hostname XXXXXX<br>> > local name XXXXXXX
<br>> > lcp renegotiation always<br>> > !<br>> > interface FastEthernet0/0<br>> > ip address X.X.X.X <a href="http://255.255.255.192" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
255.255.255.192</a><br>> > no ip mroute-cache<br>> > duplex full<br>> > !<br>> > interface FastEthernet1/0<br>> > no ip address<br>> > no ip mroute-cache<br>> > duplex full<br>> > !
<br>> > interface FastEthernet1/0.401<br>> > description !!XXXXXXXXXXXXXXXXXXXXXXXX!!<br>> > encapsulation dot1Q 401<br>> > ip address 10.70.X.X <a href="http://255.255.255.252" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
255.255.255.252</a><br>> > no ip mroute-cache<br>> > !<br>> > interface FastEthernet2/0<br>> > description !!Internet Feed!!<br>> > ip address Y.Y.Y.Y <a href="http://255.255.255.252" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
255.255.255.252</a><br>> > no ip mroute-cache<br>> > duplex full<br>> > !<br>> > interface Virtual-Template1<br>> > mtu 1492<br>> > ip unnumbered FastEthernet2/0<br>> > peer default ip address pool internet1 internet2
<br>> > ppp authentication pap vpdn<br>> > !<br>> > ip local pool internet1 A.A.A.A B.B.B.B<br>> > ip local pool internet2 C.C.C.C D.D.D.D<br>> > ip classless<br>> > ip route <a href="http://0.0.0.0" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
0.0.0.0</a> <a href="http://0.0.0.0" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">0.0.0.0</a> Y.Y.Y.Y<br>> > no ip http server<br>> > !<br>> > ip radius source-interface FastEthernet0/0
<br>> > radius-server host X.X.X.X auth-port 1645 acct-port 1646<br>> > radius-server host X.X.X.X auth-port 1645 acct-port 1646<br>> > radius-server key 7 ZZZZZZZZZZZZZZZ<br>> ><br>> > Anthony
<br>> ><br>> > ________________________________<br>> > Be one of the first to try Windows Live Mail.<br>> > _______________________________________________<br>> > cisco-bba mailing list<br>> >
<a href="mailto:cisco-bba@puck.nether.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">cisco-bba@puck.nether.net</a><br>> > <a href="https://puck.nether.net/mailman/listinfo/cisco-bba" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
https://puck.nether.net/mailman/listinfo/cisco-bba</a><br>> ><br>> ><br>> ><br><br><br><hr>Be one of the first to try <a href="http://ideas.live.com/programpage.aspx?versionId=5d21c51a-b161-4314-9b0e-4911fb2b2e6d" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
Windows Live Mail.</a></div>
<br>_______________________________________________<br>cisco-bba mailing list<br><a href="mailto:cisco-bba@puck.nether.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">cisco-bba@puck.nether.net
</a><br><a href="https://puck.nether.net/mailman/listinfo/cisco-bba" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
https://puck.nether.net/mailman/listinfo/cisco-bba</a><br><br><br></blockquote></div><br>
</span></div></blockquote></div><br>