this is true which we all know by now. there are however gotchas that are serious and you might not want to do this as the Cloud Monitoring Tool for Catalyst makes a scad of changes including SNMP v2c using the Community Public. This is bad, bad, bad and our pentester has ordered us to delete the line. SNMP v3 has been out for ages and is always preferred over v2c. and for gods sake why use the hackerfriendly community of Public?  Our CISO says Cisco is not a security company and that sure is one proof of it. ... View more

A common cause of this error is a duplicate IP address.  Perhaps try changing its IP address. ... View more

It looks like the remote end is killing your session because the MX has stopped sending keepalives.  Or perhaps these keepalives are no longer making it across.  If it is a direct link then I would assume the MX stops sending them due to some other issue. I believe a support case is in order here. ... View more