PPPoE SESSION ON CISCO 7206 ROUTER

[bassomoserge]

HI

Dear all

I have a problem of    understanting the concept of LINE CARD on a router. On our network we   are running C7203 and C7209 routers. The maximum sessions are :

• Maximum number of IP and PPPoE subscriber sessions supported per line card is 16000.

I want to know if we buy additionnal card the number of PPPoE subscriber sessions supported will be multiplied by 2.

Here  is my problem. We have have connected a DSLAM of  862 subscribers  behind a C7203 router. We translate private ip addresses  with a pool of  30 public ip addresses and we have a CPU usage of 72%.

We   have 5 others DSLAMs connected to a switch . These 5 DSLAMs support   4500 subscribers. Is it possible by buying 3 additionnal line cards on   my C7609 to have 64 000 sessions.

Also when CISCO says

• Maximum number of IP and PPPoE subscriber sessions supported per line card is 16000

does it means that in my case i have to connect each DSLAM on one particular line card?

Is   it possible to connect the cable from my switch on a C7609 router  (with  3 additionnal line cards ) and have a maximums PPPoE subscribers   sessions of 64000

Thx

[paolo bevilacqua]

64K sessions on a single box is excessive.

Suggest you get in touch with your local cisco sales office, ask for the senior telco system engineer, and have him help you design your network.

[lgijssel]

The restriction is likely because of the size of the MAC address table.

Each PPPoE subscriber has a unique mac address which is stored in this table.

Like Paolo already said: Such a huge number of subscribers is excessive.

You are likely to encounter many problems (device throughput,memory issues, performance) well before approaching even 16000 subscribers. You need to reconsider the design and take all factors into account.

regards,

Leo