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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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ifdata(1)																 ifdata(1)

NAME
ifdata - get network interface info without parsing ifconfig output SYNOPSIS
ifdata [options] {iface} DESCRIPTION
ifdata can be used to check for the existence of a network interface, or to get information abut the interface, such as its IP address. Un- like ifconfig or ip, ifdata has simple to parse output that is designed to be easily used by a shell script. OPTIONS
-h Print out a help summary. -e Test to see if the interface exists, exit nonzero if it does not. -p Prints out the whole configuration of the interface. -pe Prints "yes" or "no" if the interface exists or not. -pa Prints the IPv4 address of the interface. -pn Prints the netmask of the interface. -pN Prints the network address of the interface. -pb Prints the broadcast address of the interface. -pm Prints the MTU of the interface. Following options are Linux only. -ph Prints the hardware address of the interface. -pf Prints the flags of the interface. -si Prints out all the input statistics of the interface. -sip Prints the number of input packets. -sib Prints the number of input bytes. -sie Prints the number of input errors. -sid Prints the number of dropped input packets. -sif Prints the number of input fifo overruns. -sic Print the number of compressed input packets. -sim Prints the number of input multicast packets. -so Prints out all the output statistics of the interface. -sop Prints the number of output packets. -sob Prints the number of output bytes. -soe Prints the number of output errors. -sod Prints the number of dropped output packets. -sof Prints the number of output fifo overruns. -sox Print the number of output collisions. -soc Prints the number of output carrier losses. -som Prints the number of output multicast packets. -bips Prints the number of bytes of incoming traffic measured in one second. -bops Prints the number of bytes of outgoing traffic measured in one second. AUTHOR
Benjamin BAYART 2006-03-07 ifdata(1)
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