[cisco-nas] Cisco 3620 PPPoE session limitation

[Oliver Boehmer (oboehmer)]

And one important point: The 3620 will likely never be able to stustain
the load for a significant number of pppoe sessions (assuming those are
DSL customers).. You can likely terminate several hundreds idle sessions
at the same time, but once traffic is sent over the sessions, CPU can
max out. 

You always have two components to worry about:

- control plane scalability (how many sessions at which rate)
- fowarding plance performance (how much traffic is switched through the
box)

Either one or both are limiting factors, so you could easily reach the
max with a single session transmitting at several Mbps per second on the
3620..

	oli

Mounir Mohamed <> wrote on Tuesday, November 08, 2005 12:21 PM:

> Yes, Your router Platform can use 800 interface but i want clear some
> points, the 800 IDBs value is not for PPPOE only, NO this value for
> (PPPOE, 
> PPPOA, all interfaces) logical or physical, and there is different
> IDBs (SW= Software HW=Hardware) and upon your router output now you
> are using 7 HW and 11 SW which is totaly 18 - 800= 782 IDBs it's good
> number for Compnay but not for ISP
> 
> i hop that help :)
> 
> Best Regards,
> Mounir Mohamed
> 
> On 11/8/05, Souphonh Phounsavath <souphonh at laopdr.com> wrote:
>> 
>> 
>> Dear Mounir Mohamed,
>> 
>> 
>> 
>> Thank you very much for your kindly assistance. I am really
>> appreciate your help. The following is my output of show idb on my
>> Cisco 3620: 
>> 
>> 
>> 
>> wbb_router#sh idb
>> 
>> 
>> 
>> Maximum number of IDBs 800
>> 
>> 
>> 
>> 11 SW IDBs allocated (2608 bytes each)
>> 
>> 
>> 
>> 7 HW IDBs allocated (4720 bytes each)
>> 
>> HWIDB#1   1   Ethernet0/0 (HW IFINDEX, Ether)
>> 
>> HWIDB#2   2   Ethernet0/1 (HW IFINDEX, Ether)
>> 
>> HWIDB#3   3   Ethernet0/2 (HW IFINDEX, Ether)
>> 
>> HWIDB#4   4   Ethernet0/3 (HW IFINDEX, Ether)
>> 
>> HWIDB#5   5   Virtual-Access1 (Serial, HW VACCESS)
>> 
>> HWIDB#6   6   Virtual-Template11 (HW IFINDEX, Serial, HW VTEMPLATE)
>> 
>> HWIDB#7   7   Loopback0 (HW IFINDEX)
>> 
>> 
>> 
>> So, it has maximum number of 800 IDBs, and it has been allocated 7.
>> Does it mean that we can use up to about 700+ PPPoE connection?
>> 
>> 
>> 
>> Regards,
>> 
>> Souphonh
>> 
>> 
>> 
>> 
>> -----Original Message-----
>> From: Mounir Mohamed [mailto:mounir.mohamed at gmail.com]
>> Sent: Tuesday, November 08, 2005 5:09 PM
>> To: Souphonh Phounsavath
>> Cc: cisco-nas at puck.nether.net
>> Subject: Re: [cisco-nas] Cisco 3620 PPPoE session limitation
>> 
>> 
>> 
>> Dear Souphonh ,
>> 
>> 
>> 
>> Regarding the PPPOE sessions supported it's based on 2 factors
>> 
>> 1-CPE
>> 
>> 2-Memory
>> 
>> Also you can check the maximum number of Virtual-Access on 3620 by
>> the 
>> 
>> following command:
>> 
>> Router# show idb
>> 
>> Maximum number of IDBs 10000 ---> Maximum number on 7204
>> 
>> 1135 SW IDBs allocated (2624 bytes each)
>> 
>> 
>> 
>> Regarding the IOS you can use this image
>> 
>> c7200-js-mz.122-27.bin
>> 
>> 
>> 
>> Best Regards,
>> 
>> Mounir Mohamed
>> 
>> 
>> 
>> On 11/8/05, Souphonh Phounsavath <souphonh at laopdr.com> wrote:
>> 
>>> 
>> 
>>> 
>> 
>>> Dear All,
>> 
>>> 
>> 
>>> 
>> 
>>> 
>> 
>>> I am looking for supported document regarding the maximum PPPoE
>>> session if 
>> 
>>> we will use Cisco 3620 as PPPoE access server. In other words, what
>>> is 
>> 
>>> maximum number of PPPoE clients can access to the router at the
>>> same time? 
>> 
>>> The followings are my Router version:
>> 
>>> 
>> 
>>> 
>> 
>>> 
>> 
>>> CPU:    R4700
>> 
>>> 
>> 
>>> RAM:    64MB
>> 
>>> 
>> 
>>> Flash:   16MB
>> 
>>> 
>> 
>>> IOS:      file: c3620-jk8o3s-mz.122-17
>> 
>>> 
>> 
>>> 
>> 
>>> 
>> 
>>> If you have some ideas related to this, please advice.
>> 
>>> 
>> 
>>> 
>> 
>>> 
>> 
>>> Regards,
>> 
>>> 
>> 
>>> Souphonh
>> 
>>> 
>> 
>>> 
>> 
>>> _______________________________________________
>> 
>>> cisco-nas mailing list
>> 
>>> cisco-nas at puck.nether.net
>> 
>>> https://puck.nether.net/mailman/listinfo/cisco-nas
>> 
>>> 
>> 
>>> 
>> 
>>> 
> 
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