3Com 3C15500 - Network Director User Manual page 149

Discovery Report Errors and Warnings 145
Network Director failed to detect any routers whose ARP caches
contained entries for the MAC addresses, possibly because they are
outside the ranges of addresses you specified. Alternatively, the
appropriate router may have been discovered as an IP-only node if a valid
read community string was not provided for the router in the Network
Discovery wizard.
The consequences of this failure are that any IP-only nodes will appear at
the top of their submap, not connected to anything. Another node may
also appear within the map that just has the correct MAC address of the
node and is connected to the correct switch port.
3Com Network Director was unable to determine the write
community string for the following SNMP devices
As part of the Device Capability Stage, 3Com Network Director attempts
to validate the write community strings for certain devices. See "Device
Capability Detection " on page 93 for further information. 3Com
Network Director only attempts to do this for devices that it thinks it will
need write access to in the future (e.g. to set up the trap table for
monitoring for use by administrative tools such as Agent Update). If all
attempts to validate the write community strings fail then this message is
logged.
Multiple responses were detected during discovery from the IP
addresses listed below
During the IP Ping stage, 3Com Network Director sends an ICMP ping
message to each device IP address in the ranges specified for the subnet it
is currently detecting. It does not send ICMP ping messages to the subnet
address or broadcast address. If 3Com Network Director receives more
than one response from an ICMP ping message then it assumes that this
must be a broadcast address on the subnet and does not attempt to
discover or manage any devices using that IP address.
This may occur if one or more devices on the subnet have their subnet
mask configured incorrectly, or if the subnet address and mask were
entered incorrectly in the Specify Subnets pane of the Network Discovery
wizard.