Command:

show queue


Mode:

Router>


Syntax:

show queue interface-name interface-number [vc [vpi/] vci]]

 

Syntax Description:

interface-name The name of the interface.
interface-number The number of the interface.
vc (Optional) For ATM interfaces only, shows the fair queueing configuration for a specified permanent virtual circuit (PVC). The name can be up to 16 characters long.
vpi (Optional) ATM network virtual path identifier (VPI) for this PVC. The absence of the "/" and a vpi value defaults the vpi value to 0.

On the Cisco 7200 and 7500 series routers, this value ranges from 0 to 255.

The vpi and vci arguments cannot both be set to 0; if one is 0, the other cannot be 0.

If this value is omitted, information for all VCs on the specified ATM interface or subinterface is displayed.

vci (Optional) ATM network virtual channel identifier (VCI) for this PVC. This value ranges from 0 to 1 less than the maximum value set for this interface by the atm vc-per-vp command. Typically, lower values 0 to 31 are reserved for specific traffic (F4 Operation, Administration, and Maintenance (OAM), switched virtual circuit (SVC) signalling, Integrated Local Management Interface (ILMI), and so on) and should not be used.

The VCI is a 16-bit field in the header of the ATM cell. The VCI value is unique only on a single link, not throughout the ATM network, because it has local significance only.

The vpi and vci arguments cannot both be set to 0; if one is 0, the other cannot be 0.

 

Command Description:

To display the contents of packets inside a queue for a particular interface or virtual circuit (VC), use the show queue EXEC command.

This command displays the contents of packets inside a queue for a particular interface or VC. The show queue command is primarily for internal debugging purposes and custom queueing.

This command does not support VIP-distributed Weighted Random Early Detection WRED (DWRED). You can use the vc keyword and the show queue command arguments to display output for a PVC only on Enhanced ATM port adapters (PA-A3) that support per-VC queueing.

This command is not recommended for use with the modular QoS CLI (MQC) features. Use the show policy interface command.


Example:

The following examples show sample output when the show queue command is entered and either weighted fair queueing (WFQ), WRED, or flow-based WRED are configured.

WFQ Example

The following is sample output from the show queue command for PVC 33 on the atm2/0.33 ATM subinterface. Two conversations are active on this interface. WFQ ensures that both data streams receive equal bandwidth on the interface while they have messages in the pipeline.

Router#show queue atm2/0.33 vc 33 
Interface ATM2/0.33 VC 0/33
Queueing strategy: weighted fair
Total output drops per VC: 18149
Output queue: 57/512/64/18149 (size/max total/threshold/drops)
Conversations 2/2/256 (active/max active/max total)
Reserved Conversations 3/3 (allocated/max allocated)
(depth/weight/discards/tail drops/interleaves) 29/4096/7908/0/0
Conversation 264, linktype: ip, length: 254
source: 10.1.1.1, destination: 10.0.2.20, id: 0x0000, ttl: 59,
TOS: 0 prot: 17, source port 1, destination port 1
(depth/weight/discards/tail drops/interleaves) 28/4096/10369/0/0
Conversation 265, linktype: ip, length: 254
source: 10.1.1.1, destination: 10.0.2.20, id: 0x0000, ttl: 59,
TOS: 32 prot: 17, source port 1, destination port 2

Flow-Based WRED Example

The following is sample output from the show queue command issued for serial interface 1 on which flow-based WRED is configured. The output shows information for each packet in the queue; the data identifies the packet by number, the flow-based queue to which the packet belongs, the protocol used, and so forth.

Router#show queue Serial1
Output queue for Serial1 is 2/0
Packet 1, flow id:160, linktype:ip, length:118, flags:0x88
source:10.1.3.4, destination:10.1.2.2, id:0x0000, ttl:59,
TOS:32 prot:17, source port 1, destination port 515
data:0x0001 0x0203 0x0405 0x0607 0x0809 0x0A0B 0x0C0D
0x0E0F 0x1011 0x1213 0x1415 0x1617 0x1819 0x1A1B
Packet 2, flow id:161, linktype:ip, length:118, flags:0x88
source:10.1.3.5, destination:10.1.2.2, id:0x0000, ttl:59,
TOS:64 prot:17, source port 1, destination port 515
data:0x0001 0x0203 0x0405 0x0607 0x0809 0x0A0B 0x0C0D
0x0E0F 0x1011 0x1213 0x1415 0x1617 0x1819 0x1A1B

The following is sample output from the show queue command issued for serial interface 3 on which WRED is configured. The output has been truncated to show only 2 of the 24 packets.

Router#show queue Serial3 
Output queue for Serial3 is 24/0
Packet 1, linktype:ip, length:118, flags:0x88
source:10.1.3.25, destination:10.1.2.2, id:0x0000, ttl:59,
TOS:192 prot:17, source port 1, destination port 515
data:0x0001 0x0203 0x0405 0x0607 0x0809 0x0A0B 0x0C0D
0x0E0F 0x1011 0x1213 0x1415 0x1617 0x1819 0x1A1B
Packet 2, linktype:ip, length:118, flags:0x88
source:10.1.3.26, destination:10.1.2.2, id:0x0000, ttl:59,
TOS:224 prot:17, source port 1, destination port 515
data:0x0001 0x0203 0x0405 0x0607 0x0809 0x0A0B 0x0C0D
0x0E0F 0x1011 0x1213 0x1415 0x1617 0x1819 0x1A1B


Misconceptions:

None


Related Commands:

None

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