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PPPoA credentials

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licquorice:
Quick question that I should know the answer to but don't.
Are PPPoA credentials applied on the modem or the router?

craigski:
Router.

licquorice:
Hmm, that's what I thought as PPPoE is a router function, but there seems to be conflicting information.

craigski:
Does this help, figure 2-18 half way down:

https://www.ciscopress.com/articles/article.asp?p=363733&seqNum=2

licquorice:
That seems to show the CPE as a combined modem/ router and that the PPPoA function is on the modem side of the device. I'm not sure routers will have ATM capability on the WAN interface.

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