Do you have MPCs in the MX240? I have seen similiar issues,
which had been caused by software bugs - if so, try restarting
the linecards and do the software update. Some small packets
go through but bigger ones are sometimes dropped...

Regards,
Tom

Am 01.06.2011 15:21, schrieb Alexander Frolkin:
Hi,

I have found that the maximum PING size is 1870. If the value is 1871
I get a message "ping: sendto: Message too long". But at size 1870...I
am getting ping drops. The success rate is around 60%. Is it normal to
get ping drops? Anyways I have set the MTU to 1870+28=1898 and still
observing the BGP sessions.

Ping drops usually indicate that something is seriously wrong.  Just to
completely rule out MTU issues, do you still see drops if you just say
"ping<hostname>"?  (I'm just wondering if you have some kind of
multipathing going on somewhere, with the different paths having
different MTUs.)


Alex

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