Extreme Networks ExtremeWare XOS 11.3, Manual

Page: 610 / 698

Troubleshooting
ExtremeWare XOS 11.3 Concepts Guide
610
●
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
command to display the configuration of one or more ports.
●
That the packets are being received and transmitted.
Use the
show ports {<port_list>} statistics {no-refresh}
command to display the number
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}
—Displays receive error statistics
■
show ports {<port_list>} txerrors {no-refresh}
—Displays transmit error statistics
■
show ports {mgmt | <port_list>} collisions {no-refresh}
—Displays collision statistics
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
command to display FDB entries.
●
Your VLAN configuration, including the VLAN tag, ports in the VLAN, and whether or not the
ports are tagged.
Use the
show vlan detail
command to display detailed information for each VLAN configured on
the switch.
For additional VLAN troubleshooting tips, see “VLANs” on page 618 .
●
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 detail
—Displays the STP settings on the switch
■
show stpd ports
—Displays the STP state of a port
■
show vlan stpd
—Displays the STP configuration of the ports assigned to a specific VLAN
For additional STP troubleshooting tips, see “STP” on page 618 .
Layer 3
When troubleshooting Layer 3 issues, verify:
●
The IP address assigned to each VLAN router interface.
Use the
show vlan
command to display summary information for all of the VLANs configured on
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>}
—IPv4 environment
■
show ipconfig ipv6 {vlan <vlan_name> | tunnel <tunnelname>}
—IPv6 environment