Cisco Catalyst 3560-X User Manual

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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-25303-03
Chapter 1 Managing Switch Stacks
Troubleshooting Stacks
Identifying Loopback Problems
• Software Loopback, page 1-34
• Software Loopback Example: No Connected Stack Cable, page 1-35
• Software Loopback Examples: Connected Stack Cables, page 1-35
• Hardware Loopback, page 1-36
• Hardware Loopback Example: LINK OK event, page 1-36
• Hardware Loop Example: LINK NOT OK Event, page 1-37
Link OK This shows if the link is stable.
The link partner is a stack port on a neighbor switch.
• No—The link partner receives invalid protocol messages from the
port.
• Yes—The link partner receives valid protocol messages from the
port.
Link Active This shows if the stack port is in the same state as its link partner.
• No—The port cannot send traffic to the link partner.
• Yes—The port can send traffic to the link partner.
Sync OK
• No—The link partner does not send valid protocol messages to the
stack port.
• Yes—The link partner sends valid protocol messages to the port.
# Changes to LinkOK This shows the relative stability of the link.
If a large number of changes occur in a short period of time, link flapping
can occur.
In Loopback
• No—At least one stack port on the member has an attached stack
cable.
• Yes—None of the stack ports on the member has an attached stack
cable.
Table 1-5 show switch stack-ports summary Command Output (continued)
Field Description

Cisco Catalyst 3560-X Specifications

General

Enclosure Type	Rack-mountable - 1U
Subtype	Gigabit Ethernet
Ports	48 x 10/100/1000 + 4 x SFP
Flash Memory	64 MB
Power Device	Internal power supply
Voltage Required	AC 120/230 V (50/60 Hz)
Operating System	Cisco IOS
Device Type	Switch
Performance	Switching capacity: 128 Gbps
Jumbo Frame Support	Yes
Routing Protocol	RIP-1, RIP-2, EIGRP
Remote Management Protocol	SNMP 1, RMON 1, RMON 2, RMON 3, RMON 9, Telnet, SNMP 3, HTTP, HTTPS
Features	DHCP support, VLAN support, QoS, IPv6 support, Syslog
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3z, IEEE 802.1D, IEEE 802.1Q, IEEE 802.3ab, IEEE 802.1p, IEEE 802.3af, IEEE 802.3x, IEEE 802.3ad, IEEE 802.1w, IEEE 802.1x, IEEE 802.1s, IEEE 802.3ah, IEEE 802.1ag, IEEE 802.3at
Stacking	Stackable
Security Features	SSH, RADIUS, TACACS+
Management	CLI
Dimensions (H x W x D)	17.5 in
Operating Temperature	32 to 113 °F (0 to 45 °C)
Humidity	10 - 95% (non-condensing)