Date: Fri, 30 Mar 2001 22:55:41 -0500 From: "Louis A. Mamakos" <louie@TransSys.COM> To: Brett Glass <brett@lariat.org> Cc: freebsd-net@FreeBSD.ORG Subject: Re: Transition from modem PPP to PPPoE Message-ID: <200103310355.f2V3tf299146@whizzo.transsys.com> In-Reply-To: Your message of "Fri, 30 Mar 2001 20:27:38 MST." <4.3.2.7.2.20010330201802.00dc8f00@localhost> References: <4.3.2.7.2.20010330201802.00dc8f00@localhost>
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> while I'm not intimately familiar with PPPoE, it's obvious that > it cannot use IP addresses for its underlying communication; it must use > MAC addresses and have its own DLC mechanism. This suggests that its > packets probably have a unique Ethertype. Does anyone know offhand what > that type is, so that we can instruct the bridges to allow it through? > (Currently, the bridges only allow TCP, UDP, ICMP, and ARP and block > types such as IPX.) Yes, it uses two different registered ethernet types (which I/UUNET paid $5000 to the IEEE to get) and they are (from RFC-2516): The ETHER_TYPE is set to either 0x8863 (Discovery Stage) or 0x8864 (PPP Session Stage). See http://www.ietf.org/rfc/rfc2516.txt for more details on the protocol, if you care. louie To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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