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Operating Systems Linux Red Hat Interface goes into promiscuous mode Post 302932408 by Junaid Subhani on Wednesday 21st of January 2015 11:23:09 AM
Old 01-21-2015
Hammer & Screwdriver Interface goes into promiscuous mode

Hi all,

I am using a Linux VM.

Once the node boots up, I am able to access it and it is able to ping its default gateway.

At that time, the config is;


Code:
eth1      Link encap:Ethernet  HWaddr 00:50:56:01:01:FB  
          inet addr:142.133.174.246  Bcast:142.133.175.255  Mask:255.255.254.0
          inet6 addr: fe80::250:56ff:fe01:1fb/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1857 errors:0 dropped:0 overruns:0 frame:0
          TX packets:234 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:211236 (206.2 KiB)  TX bytes:22344 (21.8 KiB)

But within 2 minutes, I cannot ping from or to this VM any more and cannot even ping the gateway.

The config then is;

Code:
eth1      Link encap:Ethernet  HWaddr 00:50:56:01:01:FB  
          inet addr:142.133.174.246  Bcast:142.133.175.255  Mask:255.255.254.0
          inet6 addr: fe80::250:56ff:fe01:1fb/64 Scope:Link
          UP BROADCAST RUNNING PROMISC ALLMULTI MULTICAST  MTU:1500  Metric:1
          RX packets:1857 errors:0 dropped:0 overruns:0 frame:0
          TX packets:234 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:211236 (206.2 KiB)  TX bytes:22344 (21.8 KiB)

Why does the config change and how can I stop it ?

What other checks should I go through ?
 

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RDS-PING(1)						    BSD General Commands Manual 					       RDS-PING(1)

NAME
rds-ping -- test reachability of remote node over RDS SYNOPSIS
rds-ping [-c count] [-i interval] [-I local_addr] remote_addr DESCRIPTION
rds-ping is used to test whether a remote node is reachable over RDS. Its interface is designed to operate pretty much the standard ping(8) utility, even though the way it works is pretty different. rds-ping opens several RDS sockets and sends packets to port 0 on the indicated host. This is a special port number to which no socket is bound; instead, the kernel processes incoming packets and responds to them. OPTIONS
The following options are available for use on the command line: -c count Causes rds-ping to exit after sending (and receiving) the specified number of packets. -I address By default, rds-ping will pick the local source address for the RDS socket based on routing information for the destination address (i.e. if packets to the given destination would be routed through interface ib0, then it will use the IP address of ib0 as source address). Using the -I option, you can override this choice. -i timeout By default, rds-ping will wait for one second between sending packets. Use this option to specified a different interval. The timeout value is given in seconds, and can be a floating point number. Optionally, append msec or usec to specify a timeout in milliseconds or microseconds, respectively. Specifying a timeout considerably smaller than the packet round-trip time will produce unexpected results. AUTHORS
rds-ping was written by Olaf Kirch <olaf.kirch@oracle.com>. SEE ALSO
rds(7), rds-info(1), rds-stress(1). BSD
Apr 22, 2008 BSD
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