IMPORTANT: For NET-SNMP agents, these objects (
sysLocation.0,
sysContact.0
and
sysName.0
) ordinarily are read-write. However, specifying the
value for one of these objects by giving the appropriate token in snmpd.conf makes the
corresponding object read-only, and attempts to set the value of the object will result in a
notWritable error response.
The processing for link up and link down traps is now user configurable. As the default, traps
conform to RFC2863, meaning the trap contents will include:
ifIndex, ifAdminStatus
and
ifOperstatus
You can alter this behavior by specifying:
cisco_link_traps on
If
cisco_link_traps
are turned on as described then link up and link down traps will have a
cisco-like format and the trap contents will include:
ifDescr and ifType
Examine and edit
/usr/share/snmp/snmpd.conf
appropriately for your configuration.
Information in
/usr/share/snmp/snmpd.conf
is only read at startup - or when the daemon is
forced to reread its configuration. See the standard Linux man page for
snmpd.conf
for more
details.
SNMP Applications
The OpenArchitect switch includes the
snmpget
,
snmpwalk
, and
snmpset
applications you
can use these standard Linux utilities to test your SNMP agent. For example,
snmpwalk localhost –c public
walks the entire MIB of the localhost (OpenArchitect switch) starting at the top of the MIB. See
the
Linux Reference Man Pages
for the usage of the SNMP utilities.
MIB values are decoded from their numerical representations into readable text by parsing MIBs
located in the
/usr/share/snmp/mibs/
directory. If you need to add a MIB, add it to that
directory and
zsync
to save across reboots.
Port Mirroring
zmirror
sets packet mirroring from a given set of ports to a given port. Turning on packet
mirroring causes a copy of the packet to be sent to the
mirror_to
port. There can be only a
single
mirror_to
port, but there can be multiple
mirror_from
ports. The
zmirror
command overwrites the
mirror_to
port. The
zmirror
command accumulates the
mirror_from
ports. Note, there are performance issues when trying to mirror more bandwidth
than is available on the
mirror_to
port. Use the
zmirror
command in the following way:
Ethernet Switch Blade User's Guide
release 3.2.2j
page 136
Downloaded from
www.Manualslib.com
manuals search engine