Re: Multicast use on a Linux server

2011-01-19 Thread Marcy Cortes
I tried the netstat from tcpmaint and got DTCNET338E * MAC address is not in the ARP table. Also tried the qetharp and got Unsuccessful: Operation not permitted Suspect that it doesn't work on a L2 vswitch... But we've tracked them all dow

Re: Multicast use on a Linux server

2011-01-19 Thread David K. Kelly
Re: Multicast use on a Linux server 01/18/2011 08:52 PM Please respond to Linux on 390 Port Thanks Scott, Philip, and Alan, That gives me enough info. Curious though how to map the mac addr to the IP from Linux itself? They

Re: Multicast use on a Linux server

2011-01-19 Thread David Kreuter
Marcy - try doing 2 netstat arp all tcp commands from TCPMAINT at least 1 second apart. It will report on the MAC arp table in use. David Original Message Subject: Re: Multicast use on a Linux server From: Marcy Cortes Date: Tue, January 18, 2011 8:52 pm To: LINUX-390

Re: Multicast use on a Linux server

2011-01-19 Thread Harold Grovesteen
Philip Rowlands wrote: On 19/01/2011 01:52, Marcy Cortes wrote: Thanks Scott, Philip, and Alan, That gives me enough info. Curious though how to map the mac addr to the IP from Linux itself? They don't show up in arp -n . Would one check at the router? There's a defined many -> one mapp

Re: Multicast use on a Linux server

2011-01-19 Thread Philip Rowlands
On 19/01/2011 01:52, Marcy Cortes wrote: Thanks Scott, Philip, and Alan, That gives me enough info. Curious though how to map the mac addr to the IP from Linux itself? They don't show up in arp -n . Would one check at the router? There's a defined many -> one mapping from IP multicast addre

Re: Multicast use on a Linux server

2011-01-18 Thread Marcy Cortes
Thanks Scott, Philip, and Alan, That gives me enough info. Curious though how to map the mac addr to the IP from Linux itself? They don't show up in arp -n . Would one check at the router? cdztv17142:~ # netstat -gn(-n being more needed to avoid the dummy dns

Re: Multicast use on a Linux server

2011-01-18 Thread Philip Rowlands
On 18/01/2011 21:49, Marcy Cortes wrote: Hello, General Linux question here... Is there a way to tell all the multicast addresses are particular server might be using? # netstat --groups or # ip maddress show will show which addresses a host is using. Cheers, Phil -

Re: Multicast use on a Linux server

2011-01-18 Thread Scott Rohling
Just poking around /proc/net I see /proc/net/dev_mcast .. it seems to correspond to the multicast addresses I see in Q VSWITCH DETAILS.. Scott Rohling On Tue, Jan 18, 2011 at 2:49 PM, Marcy Cortes wrote: > Hello, > > General Linux question here... > > Is there a way to tell all the multicast

Re: Multicast use on a Linux server

2011-01-18 Thread Alan Altmark
On Tuesday, 01/18/2011 at 04:52 EST, Marcy Cortes wrote: > Is there a way to tell all the multicast addresses are particular server might > be using? If the server is using a virtual NIC on z/VM, you can query the NIC (or QUERY VSWITCH DETAILS) and and see the registered MAC (layer 2) and IP add

Multicast use on a Linux server

2011-01-18 Thread Marcy Cortes
Hello, General Linux question here... Is there a way to tell all the multicast addresses are particular server might be using? Marcy -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists..