route command to configure a static (default) route before enabling routing. For more information, see "IP
Routing Features" in the multicast and routing guide for your switch.
• Telnet access may be disabled by the Inbound Telnet Enabled parameter in the System Information
screen of the menu interface:
2. Switch Configuration
1. System Information
• The switch may not have the correct IP address, subnet mask, or gateway. Verify by connecting a console to
the switch's Console port and selecting:
2. Switch Configuration
5. IP Configuration
• If you are using DHCP to acquire the IP address for the switch, the IP address "lease time" may have expired
so that the IP address has changed. For more information on how to "reserve" an IP address, see the
documentation for the DHCP application that you are using.
• If one or more IP-authorized managers are configured, the switch allows inbound telnet access only to a
device having an authorized IP address. For more information on IP Authorized managers, see the access
security guide for your switch.
Unusual network activity
Network activity that fails to meet accepted norms may indicate a hardware problem with one or more of the
network components, possibly including the switch. Such problems can also be caused by a network loop or
simply too much traffic for the network as it is currently designed and implemented. Unusual network activity is
usually indicated by the LEDs on the front of the switch or measured with the switchconsole interface or with a
network management tool. For information on using LEDs to identify unusual network activity, see the installation
guide you received with the switch.
A topology loop can also cause excessive network activity. The Event Log "FFI" messages can be indicative of
this type of problem.
General problems
The network runs slow; processes fail; users cannot access servers or other devices
Broadcast storms may be occurring in the network. These may be caused by redundant links between nodes.
• If you are configuring a port trunk, finish configuring the ports in the trunk before connecting the related cables.
Otherwise you may inadvertently create a number of redundant links (that is, topology loops) that will cause
broadcast storms.
• Turn on STP to block redundant links
• Check for FFI messages in the Event Log
Duplicate IP addresses
This is indicated by this Event Log message:
ip: Invalid ARP source: IP address on IP address
where both instances of IP address are the same address, indicating that the switch's IP address has been
duplicated somewhere on the network.
308 Aruba 2530 Management and Configuration Guide for
ArubaOS-Switch 16.05
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