— Exhibit —
user@router> show class-of-service scheduler-map two
Scheduler map: two, Index: 56974
Scheduler: sch-best-effort, Forwarding class: best-effort, Index: 26057
Transmit ratE. 1 percent, Rate Limit: exact, Buffer sizE. remainder,
Buffer Limit: exact, Priority: low
Excess Priority: unspecified
Drop profiles:
Loss priority Protocol Index Name
Low any 1 <default-drop-profile>
Medium low any 1 <default-drop-profile>
Medium high any 1 <default-drop-profile>
High any 1 <default-drop-profile>
Scheduler: sch-expedited-forwarding, Forwarding class:
expedited-forwarding, Index: 10026
Transmit ratE. 1 percent, Rate Limit: none, Buffer sizE. 1 percent,
Buffer Limit: none, Priority: high
Excess Priority: unspecified
Drop profiles:
Loss priority Protocol Index Name
Low any 1 <default-drop-profile>
Medium low any 1 <default-drop-profile>
Medium high any 1 <default-drop-profile>
High any 1 <default-drop-profile>
user@router> show interfaces ge-0/0/1 extensive | find “CoS Information”
CoS information:
Direction : Output
CoS transmit queue Bandwidth Buffer
Priority Limit
% bps % usec
0 best-effort 1 10000000 r 0
low exact
1 expedited-forwarding 1 10000000 1 0
high none
Logical interface ge-0/0/1.823 (Index 74) (SNMP ifIndex 506) (Generation
139)
Flags: SNMP-Traps 0x4000 VLAN-Tag [ 0x8100.823 ] Encapsulation: ENET2
Traffic statistics:
Input bytes : 1820224529
Output bytes : 6505980
Input packets: 1436371
Output packets: 75905
(… output truncated …)
user@router> show interfaces ge-0/0/1 extensive | find “Queue Counters”
Queue counters: Queued packets Transmitted packets Dropped packets
0 best-effort 1343970 1343970 7105
1 expedited-fo 53987 53987
0
2 assured-forw 0 0
0
3 network-cont 0 0
0
Queue number: Mapped forwarding classes
0 best-effort
1 expedited-forwarding
2 assured-forwarding
3 network-control
Active alarms : None
Active defects : None
(… output truncated …)
— Exhibit —
Click the Exhibit button.
Based on the configuration in the exhibit, why are you seeing drops in the best-effort queue on the
SRX Series platform?
A.
The drop-profile fill level is set too low.
B.
Packets are dropped by a firewall policy.
C.
The best-effort queue is being shaped.
D.
The scheduler is not being applied correctly.