show stacking stack-ports

Description

This command displays the port states of each node in the stack topology and the connections between the nodes.

Syntax Description

This command has no arguments or variables.

Default

N/A.

Usage Guidelines

The slot number shown is the slot number in use on stacking enabled nodes. If the node does not have stacking enabled, a hyphen character (-) is shown instead of a number.

The Port and Node MAC Address field values in the command display identify a particular stacking port. Each node MAC address appears twice in two consecutive rows in the output because each node has two stacking ports. On all platforms, the ports are labeled with the values 1 or 2. The order in which stacking ports appear in the display is the order in which they are physically connected.

The Select field indicates whether the stacking port is using a native stacking port or an alternate 10Gbps Ethernet port. If a number appears in this column, it represents the port number printed on the switch for a 10 Gbps Ethernet port. For more information, see the description for the configure stacking-support stack-ports command.

The Port State field for each port shows one of the following states:

Link Down – port is not receiving a signal.
No Neighbor – the port is receiving a signal but it is not identifying a stack neighbor.
Overflow – 17 nodes (or more) are physically connected to this port.
Inhibited – When you connected the link, active topologies were detected on both sides, and at least one slot number was duplicated. The stack merge is blocked.
Operational – the port is operational in the stack. This is a necessary but insufficient condition for the port to be used for control path or user data. For example, a node with stacking Failed state may still show its port states as Operational.

The Flags field contains the following flag definitions:

C - The control path is active on this port. Note that the user data path over the stack links follows the control path.
B - The port is blocked from transmitting traffic that is to be flooded to multiple non-stacking ports. This flag is only set in an active ring topology on two adjacent ports. In the example below, the active topology is a daisy chain, so no ports are blocked.

Identified with the asterisk, the current node is the one on which the show stacking command was executed. The stack topology is shown in a particular order. In a ring topology, the current node is always the first node, the next node is the node connected to the port 2 of the first node, and the last node is the node connected to the port 1 of the current node. In a daisy chain, the order shown depends on the connection of the node on which the command executes:

The first node is the one at the far end of the daisy-chain connected to the current node port 1.
The last node is the one at the far end of the daisy-chain connected to the current node port 2.
The previous node is the one at the near end of the daisy-chain connected to the current node port 1.
The next node is the one at the near end of the daisy-chain connected to the current node port 2.
If there is no node connected to the current node port 1, the current node is the first node.
If there is no node connected to the current node port 2, the current node is the last node.

The port speed is the unidirectional speed of the port.

Note

Some VIM names include speed ratings which are 4 times the unidirectional stacking port speed. For example, the actual stacking port speed for VIM1-SummitStack512 is 128 Gbps. The 512 Gbps rating for the VIM is the unidirectional rate X 2 (bidirectional) X 2 (ports).

Example

The following example shows the command output for a stack that is operating in a ring and uses both native and alternate stack ports:

Slot-1 Stack.9 # show stacking stack-ports
Stack Topology is a Ring
Slot Port Select Node MAC Address  Port State  Flags Speed
---- ---- ------ ----------------- ----------- ----- -----
*1   1    23     00:04:96:26:6b:ec Operational C-      10G
*1   2    Native 00:04:96:26:6b:ec Operational CB      64G
2   1    Native 00:04:96:18:7d:e8 Operational CB      64G
2   2    24     00:04:96:18:7d:e8 Operational C-      10G
3   1    23     00:04:96:27:c5:12 Operational C-      10G
3   2    Native 00:04:96:27:c5:12 Operational C-      64G
4   1    Native 00:04:96:26:6b:34 Operational C-      64G
4   2    24     00:04:96:26:6b:34 Operational C-      10G
* - Indicates this node
Flags:  (C) Control path is active, (B) Port is Blocked
Slot-1 Stack.10 #

The following example shows the command output for stacks that use the 512 Gbps stacking ports:

Slot-1 Stack.2 # show stacking stack-ports
Stack Topology is a Ring
Slot Port Select Node MAC Address  Port State  Flags Speed
---- ---- ------ ----------------- ----------- ----- -----
*1   1    Native 00:04:96:35:8b:a5 Operational C-     128G
*1   2    Native 00:04:96:35:8b:a5 Operational C-     128G
2   2    Native 00:04:96:35:a8:b0 Operational C-     128G
2   1    Native 00:04:96:35:a8:b0 Operational C-     128G

Note

Although the VIM1-SummitStack512 option card has four physical ports, the physical ports are grouped into two pairs, forming two logical ports. The show stacking stack-ports command displays the status of the logical ports.

History

This command was first available in ExtremeXOS 12.0.

The Select column was added in ExtremeXOS 12.5.

Platform Availability

This command is available with all licenses and platforms that support the SummitStack feature. For information about which licenses and platforms support the SummitStack feature, see the Feature License Requirements document.

Published August 2016prev | next

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