Hitachi GR2000 Series Installation Manual page 210

line speed is slow.
A case of too many number of the connected IP network or connected
interface.
For example, a case where the number of interface of the device is too
many, or a case where retrieval of the IP related MIB information takes
excessive amount of time.
A case of too many number of too many entries in routing table.
For example, in case where the number of IP routing entries in the device
is too many, retrieval of the IP related MIB information takes excessive
amount of time, or MIB response drop occurs due to reduction of the CPU
allotment time to retrieve the MIP information by route calculations.
A case of too many number of ARP.
A case where retrieval of the IP related MIB information takes excessive
amount of time if the number of ARP of this device is too many.
A case of too many number of connected SNMP manager.
For example, a case where the number of SNMP manager to be connected
to this device is too many, and collection of the MIB information
concentrates in a certain length of time.
Review of the collection cycle of the MIB information in the SNMP manager.
This device increases the amount of management information (MIB) in