PPPoE SESSION ON CISCO 7206 ROUTER
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07-27-2011 08:50 AM
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
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07-27-2011 03:49 PM
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.
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07-28-2011 04:10 AM
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
