RE: Here's an easy one
Multicast MAC address' have the second bit odd. That is 01- or 03- to 0f- The 01-00-5E (I believe) is the multicast address assigned(?) to CGMP/IGMP -Original Message- From: Jack Williams [mailto:[EMAIL PROTECTED]] Sent: Friday, February 23, 2001 10:47 AM To: Williamson, Paul; [EMAIL PROTECTED] Subject: RE: Here's an easy one I'm sure the group will tell me if I put my foot in my mouth, but: Multicast *destination* MAC addresses start with 01-00-5E --Original Message-- From: "Williamson, Paul" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Sent: February 23, 2001 3:23:34 PM GMT Subject: Here's an easy one Ok so we know how to convert a multicast ip into a mac, how about the reverse. I got a syslog message that made me curious:- "invalid traffic from multicast source address 0f:37:59:6f:df:0d" and i thought well i wonder what ip address that would be but i couldn't figure out the first octet. Should all multicast mac addresses start with 01-00-5e ?? Is this mac address invalid ? Anyone ? Thanks -Paul PLEASE READ: The information contained in this e-mail is confidential and intended for the named recipient(s) only. If you are not an intended recipient of this email you must not copy, distribute or take any further action in reliance on it and you should delete it and notify the sender immediately. Email is not a secure method of communication and Nomura International plc cannot accept responsibility for the accuracy or completeness of this message or any attachment(s). Please check this e-mail for virus infection, for which Nomura International plc accepts no responsibility. If verification of this email is sought then please request a hard copy. Unless otherwise stated any views or opinions presented are solely those of the author and do not represent those of Nomura International plc. This email is intended for informational purposes only and is not a solicitation or offer to buy or sell securities or related financial instruments. Nomura International plc is regulated by the Securities and Futures Authority Limited and is a member of the London Stock Exchange. _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Here's an easy one
I'm sure the group will tell me if I put my foot in my mouth, but: Multicast *destination* MAC addresses start with 01-00-5E --Original Message-- From: "Williamson, Paul" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Sent: February 23, 2001 3:23:34 PM GMT Subject: Here's an easy one Ok so we know how to convert a multicast ip into a mac, how about the reverse. I got a syslog message that made me curious:- "invalid traffic from multicast source address 0f:37:59:6f:df:0d" and i thought well i wonder what ip address that would be but i couldn't figure out the first octet. Should all multicast mac addresses start with 01-00-5e ?? Is this mac address invalid ? Anyone ? Thanks -Paul PLEASE READ: The information contained in this e-mail is confidential and intended for the named recipient(s) only. If you are not an intended recipient of this email you must not copy, distribute or take any further action in reliance on it and you should delete it and notify the sender immediately. Email is not a secure method of communication and Nomura International plc cannot accept responsibility for the accuracy or completeness of this message or any attachment(s). Please check this e-mail for virus infection, for which Nomura International plc accepts no responsibility. If verification of this email is sought then please request a hard copy. Unless otherwise stated any views or opinions presented are solely those of the author and do not represent those of Nomura International plc. This email is intended for informational purposes only and is not a solicitation or offer to buy or sell securities or related financial instruments. Nomura International plc is regulated by the Securities and Futures Authority Limited and is a member of the London Stock Exchange. _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Here's an easy one
Ok so we know how to convert a multicast ip into a mac, how about the reverse. I got a syslog message that made me curious:- "invalid traffic from multicast source address 0f:37:59:6f:df:0d" and i thought well i wonder what ip address that would be but i couldn't figure out the first octet. Should all multicast mac addresses start with 01-00-5e ?? Is this mac address invalid ? Anyone ? Thanks -Paul PLEASE READ: The information contained in this e-mail is confidential and intended for the named recipient(s) only. If you are not an intended recipient of this email you must not copy, distribute or take any further action in reliance on it and you should delete it and notify the sender immediately. Email is not a secure method of communication and Nomura International plc cannot accept responsibility for the accuracy or completeness of this message or any attachment(s). Please check this e-mail for virus infection, for which Nomura International plc accepts no responsibility. If verification of this email is sought then please request a hard copy. Unless otherwise stated any views or opinions presented are solely those of the author and do not represent those of Nomura International plc. This email is intended for informational purposes only and is not a solicitation or offer to buy or sell securities or related financial instruments. Nomura International plc is regulated by the Securities and Futures Authority Limited and is a member of the London Stock Exchange. _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]