Link and SNMP Status
Physical Link Status
SNMP Operational Status
zre1
zre2
zre1
zre2
zhp0
down
down
down
down
down
down
up
down
up
up
up
down
up
down
up
up
up
up
up
up
Table 5.3: Link and SNMP Status
The administrative status is directly controlled by
ifconfig
up/down. The administrative status
of the
zhps
and
zres
do not affect each other.
ifStackTable Entries
In the actual
ifStackTable
as shown in the MIB walk the following two OIDs (which denote
ifIndexes) show the relationships.
ifMIB.ifMIBObjects.ifStackTable.ifStackEntry.ifStackStatus.0.1 =
active(1)
ifMIB.ifMIBObjects.ifStackTable.ifStackEntry.ifStackStatus.0.2 =
active(1)
If they are X.Y then
•
if X = 0 there is nothing above this interface
•
if Y = 0 there is nothing below this interface
otherwise interface X has interface Y as a logical constituent.
SNMP Configuration
The SNMP agent is called snmpd and is started by default from the Linux boot up script
/etc/rcZ.d/S75snmpd
. If you do not wish to start snmpd, remove
etc/rcZ.d/S75snmpd
.
Configuration of the OpenArchitect switch SNMP agent is the same as configuration of any
standard Linux host that uses the NET-SNMP agent. Configuration information for persistent
data and security information is kept in
snmpd.conf
under the default SNMP configuration
location, which for the OpenArchitect switch is
/usr/share/snmp. snmpd.conf
is the
location to change
sys
information such as the
syslocation
and
syscontact
, as well as
permissions such as the
rocommunity
or
rwcommunity
.
NOTE: 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
Ethernet Switch Blade User's Guide
release 3.2.2j
page 81
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