Layer 2; Layer 3 - Extreme Networks ExtremeWare XOS Guide Manual

Troubleshooting
That the port is enabled, the link status is active, and speed and duplex parameters match the port
●
settings at the other end of the cable.
Use the
show ports configuration
That the packets are being received and transmitted.
●
Use the
show ports {<port_list>} statistics {no-refresh}
of packets being received and transmitted.
That there are no packet errors.
●
Use the following commands to display packet error statistics:
■
show ports {<port_list>} rxerrors {no-refresh}
■
show ports {<port_list>} txerrors {no-refresh}
■
show ports {mgmt | <port_list>} collisions {no-refresh}

Layer 2

When troubleshooting Layer 2 issues, verify:
That the MAC addresses are learned, in the correct Virtual LAN (VLAN), and are not blackhole
●
entries.
Use the
show fdb
Your VLAN configuration, including the VLAN tag, ports in the VLAN, and whether or not the
●
ports are tagged.
Use the
show vlan
the switch.
For additional VLAN troubleshooting tips, see
Your Spanning Tree Protocol (STP) configuration, including the STP domain (STPD) number, VLAN
●
assignment, and port state.
Use the following commands to display STP information:
■
show stpd
■
show stpd ports
■
show vlan stpd
For additional STP troubleshooting tips, see

Layer 3

When troubleshooting Layer 3 issues, verify:
The IP address assigned to each VLAN router interface.
●
Use the
show vlan
the device.
That IP forwarding is enabled, the routing protocol is globally enabled, and the routing protocol is
●
enabled for a VLAN.
To display the configuration information for a specific VLAN, use one of the following commands:
■
show ipconfig {ipv4} {vlan <vlan_name>}
■
show ipconfig ipv6 {vlan <vlan_name> | tunnel <tunnelname>}
610
command to display the configuration of one or more ports.
command to display FDB entries.
command to display detailed information for each VLAN configured on
detail
—Displays the STP settings on the switch
detail
—Displays the STP state of a port
—Displays the STP configuration of the ports assigned to a specific VLAN
command to display summary information for all of the VLANs configured on
command to display the number
—Displays receive error statistics
—Displays transmit error statistics
"VLANs" on page 618.
"STP" on page 618.
—IPv4 environment
—Displays collision statistics
—IPv6 environment
ExtremeWare XOS 11.3 Concepts Guide