ping giving Source quench received

[MikeL_4]

I am running HPUX 11.11 and have been experiencing some strang network issues. When checking into it further the Network group is telling me that when they do a ping to the server the ping command is returning:

Reply from 155.90.12.239: Source quench received.

Everything I've seen posted seems to be dealing with 11.0 servers, any ideas ??

[Jeff Schussele · Accepted solution]

Hi Mike,

Well I'm not positive just what's causing the message but you can turn off the sending of it via the ndd command. Run the following:

ndd -set /dev/ip ip_send_source_quench 0

to turn it off. Then edit /etc/rc.config.d/nddconf as follows:

TRANSPORT_NAME[X]=ip
NDD_NAME[X]=ip_send_source_quench
NDD_VALUE[X]=0

to keep it turned off on reboot. Of course substitute an appropriate index value for X.

HTH,
Jeff

[HGN]

Hi

Looks like this may be because of the speed difference between the two, this happens generally when a low speed network talks to a high speed network(generally from a dial-up connection to another server)

Rgds

HGN

[MikeL_4]

This is happening on an internal network that we use for Disaster Recovery testing.

For whatever reason the problem goes away and then comes back from time to time.....

[Gordon Morrison_1]

Are either (or both) of these NICs set to auto-negotiate? Network congestion could be causing it to re-negotiate the speed. I've seen this happen before (though not with tat error message). Unfortunately, the Network team always sorted it out, so I don't know quite how they did it.

[Gerhard Roets]

Hi Mike

Source Quench Messages is an IP ICMP message implying the following. The server is getting data at to high a rate and can not buffer it. This messages then means please send data in smaller bursts.

This can happen when your server forced set to a lower speed network than which the switch is force set.

Also make sure your MTU sizes between your equipment matches for ethernet generally it is set to 1500.

This can also be because of a problem on the link between to sites and the routers can not keep up with the data.

If it is an K-class you are talking to on an HP-PB network card check that the machine is not totally overloaded.

HTH
Gerhard

[Ron Kinner]

I think it's the same problem as with 11.0. I've heard the patch never really worked well. Source Quench is pretty much obsolete these days. Just turn it off as Jeff said to do.

Ron

[MikeL_4]

Thanks for all the information... I set the ip_send_source_quench parameter to 0.

[Global Server Operation]

Thanks to all that replied. The problem was resolved by changing the ndd -set /dev/ip ip_send_source_quench 0 to turn it off. Then edit /etc/rc.config.d/nddconfn

I appreciate all the replies.

[Elie Karam]

sorry guys...
but isn t that running away from the problem??