Macro 32 Ramblings

Mind Archive

JunOSe: Monitoring Forwarding and Drop Rates on the Egress Queue

Monitoring Forwarding and Drop Rates on the Egress Queue

Purpose

Display information about forwarding and drop rates on the egress
queue. The show egress-queue rates command
is useful even if no statistics profiles are configured. You can view
information about all of the queues even if statistics gathering has
not been enabled.

The minimum rate for the queue is the minimum rate at which
a node or queue can transmit when all other nodes and queues compete
for bandwidth. The system determines the minimum rates by the weight
and assured rate configured in a scheduler profile, and are subject
to shaping rate and shared-shaping rate configured.

The maximum rate is the maximum rate at which a node or queue
can transmit when there are no other nodes or queues competing for
bandwidth. The system calculates the maximum rate as the minimum of
all shaping rates, shared-shaping rates, and the port rate from the
node or queue down to the port.

For example, if a scheduler column configured over a Fast Ethernet
port consists of a VLAN queue that has been shaped to 5 Mbps
over a VLAN node that has been shaped to 8 Mbps, over an S-VLAN
node which is not shaped, then:

  • The VLAN queue that is shared-shaped to 5 Mbps has
    a maximum rate of 5 Mbps.
  • The VLAN node that is shaped to 8 Mbps has a maximum
    rate of 8 Mbps.
  • The S-VLAN node which is not shaped has a maximum rate
    of 100 Mbps.
  • The Fast Ethernet port with a bandwidth of 100 Mbps
    has a maximum rate of 100 Mbps.

Action

To display rate statistics only for queues that have queue rate statistics
enabled:

host1# show egress-queue rates brief interface fastEthernet 9/0.2

                        traffic                forwarded aggregate minimum maximum
interface                class                   rate    drop rate  rate    rate
---------------------- ----------------------- --------- --------- ------- -------
ip FastEthernet9/0.2   best-effort                     0         0   25000 1000000
                       videoTrafficClass               0         0  375000 1000000
                       multicastTrafficClass           0         0  925000 1000000
                       internetTrafficClass            0         0   50000 1000000
   Total:                                              0         0
 
   Queues reported:                    4
   Queues filtered (under threshold):  0
   Queues disabled (no rate period):   0
   Queues disabled (no resources):     0
   Total queues:                       4

To display rate statistics by color rather than as an aggregate
of all colors:

host1# show egress-queue rates color interface gigabitEthernet 1/0  
                        traffic   forwarded      committed     conformed      exceeded
      interface          class      rate         drop rate     drop rate     drop rate
----------------------  -------  ------------  ------------  ------------  ------------
ip GigabitEthernet1/0   tc1         14645184             0             0             0
                        tc2         11950400       2706400             0             0
                        tc3          9960792             0       4707200             0
                        tc4          7967200             0             0       6705600
Queues reported:                    4
Queues filtered (under threshold):  0
Queues disabled (no rate period):   1
Queues disabled (no resources):     0
Total queues:                       5

To display rate statistics all of the configured queues, along
with the minimum and maximum rates for the queues, even when statistics
gathering has not been enabled:

host1#show egress-queue rates full interface atm 11/0
                         traffic                forwarded aggregate   minimum   maximum
interface                class                   rate    drop rate    rate      rate
---------------------- ----------------------- --------- ---------   ------- —------
ip ATM11/0.1           best-effort                     *         *     24979   30000000
                       tc1                             0         0  14987510   30000000
                       tc2                             0         0   9991673   30000000
                       tc3                             0         0   4995836   30000000
ip ATM11/0.2           best-effort                     *         *     19980   20000000
                       tc1                             0         0  11988011   20000000
                       tc2                             0         0   7992007   20000000
    Queues reported:                    5
    Queues filtered (under threshold):  0
  * Queues disabled (no rate period):   2
  **Queues disabled (no resources):     0
    Total queues:                       7

To display rate statistics based on an S-VLAN:

host1# show egress-queue rates interface gigabitEthernet 11/0 svlan 0

                                                 traffic        forwarded   aggregate      minimum
            interface                             class            rate     drop rate       rate
---------------------------------             -----------        ---------  ---------     ---------
svlan GigabitEthernet 11/0 svlan 0 tc1              0              0                      166666666
vlan GigabitEthernet 11/0.1                        tc1             0            0         166666666
ip GigabitEthernet 11/0.1                      best-effort         0            0                 0
vlan GigabitEthernet 11/0.2                        tc2             0            0                 0
ip GigabitEthernet 11/0.2                       best-effort        0            0                 0
                                                         
                                                 maximum
            interface                              rate
---------------------------------               ----------
svlan GigabitEthernet 11/0 svlan 0              1000000000
vlan GigabitEthernet 11/0.1                     1000000000
ip GigabitEthernet 11/0.1                       1000000000
vlan GigabitEthernet 11/0.2                     1000000000
ip GigabitEthernet 11/0.2                       1000000000
  Queues reported:                    5
  Queues filtered (under threshold):  0
* Queues disabled (no rate period):   0
**Queues disabled (no resources):     0
  Total queues: 5

In the output of this command, the aggregate of all drop rates—WRED,
tail, and forwarding events—is displayed in the aggregate drop
rate field. You cannot distinguish among the counters used for different
drop rates from the output of this command. As a result, for ES2 10G
ADV LMs, you cannot identify the counters used for committed, conformed,
and exceeded packet dropping by WRED functionality from the value
displayed in this field. View the value displayed for the Dropped
by WRED committed field in the output of the show ip
interface
command to know the cumulative number of committed,
conformed, and exceeded packets dropped by WRED for ES2 10G ADV LMs.

To display rate statistics for the previous or current rate
period:

host1#show egress-queue rates previous interface gigabitEthernet 11/0 svlan 
0

host1#show egress-queue rates current interface gigabitEthernet 11/0 svlan 
0


To display rate statistics for an L2TP session:

host1#show egress-queue rates l2tp session session1

To display rate statistics for a tunnel interface, specify the
interface at the root of the scheduler hierarchy located on the tunnel-service
interface or at the same hierarchy for LNS GRE tunnel traffic:

host1#show egress-queue rates tunnel-server 6/0

To display rate statistics for queues bound to the specified
interface:

host1#show egress-queue rates interface gigabitEthernet 11/0 svlan 0 explicit 

To display the sum of all rates of queues bound to interfaces
that are stacked above the specified interface.

host1#show egress-queue rates interface gigabitEthernet 11/0 svlan 0 summary


To display rate statistics for queues belonging to a specific
traffic class:

host1#show egress-queue rates interface gigabitEthernet 11/0 svlan 0 traffic-class voice

To filter output based on the number of queues with rates that
exceed the specified value.

host1#show egress-queue rates gigabitEthernet 1/0 rate-exceeding committed
host1#show egress-queue rates gigabitEthernet 1/0 rate-exceeding conformed
host1#show egress-queue rates gigabitEthernet 1/0 rate-exceeding exceeded
host1#show egress-queue rates gigabitEthernet 1/0 rate-exceeding forwarded

Meaning

Table 1 lists the show
egress-queue rates
command output fields.

Table 1: show egress-queue
rates Output Fields

Field Name

Field Description

interface

Name of the interface

traffic class

Name of the traffic class

forwarded rate

Statistics for the rate at which packets are enqueued.

In some time periods, the enqueue rate might exceed the dequeue
rate. This can occur when a burst of traffic arrives at a queue which
might be dequeuing at a slower rate because of a shaper or congestion.

In other time periods, the enqueue rate might be less than the
dequeue rate. This can occur when a buffered burst of packets are
being dequeued, and no new packets are arriving at the queue.

aggregate drop rate

Total number of all drop rates

committed drop rate

Drop rate for green packets

conformed drop rate

Drop rate for yellow packets

exceeded drop rate

Drop rate for red packets

minimum rate

Minimum rate for queue

maximum rate

Maximum rate for queue

Queues reported

Number of queues reported

Queues filtered (under threshold)

Number of queues not reported because they are under
the threshold

Queues disabled (no rate period)

Number of queues not displayed because statistics gathering
is disabled (that is, the referenced statistics profile does not have
a rate period set)

Queues disabled (no resources)

Number of queues not displayed because no resources were
available

Total queues

Total number of queues within the hierarchical scope
of the command