This article describes how to interpret sp-* interface statistics.
For a physical interface or logical unit, input statistics refer to statistics of the packets entering the interface, while output statistics refer to statistics of the packets leaving the interface. This behavior is reversed for sp-* interfaces.
In sp-* interfaces, statistics are reported from the PFE`s (ingress/egress) perspective.
The configuration below is used to explain how to understand and interpret sp-* interface statistics.
Configuration
service-set next-hop {
next-hop-service {
inside-service-interface sp-1/2/0.1; <- Interface to internal network
outside-service-interface sp-1/2/0.2; <- Interface to remote network
}
}
lab@white# show interfaces sp-1/2/0
Jun 15 05:34:57
unit 1 {
family inet;
service-domain inside;
}
unit 2 {
family inet;
service-domain outside;
}
Explanation & Example
For sp-* logical interfaces, the interface statistics are reported from the ingress and egress PFE`s perspective.
Packets leaving the PFE towards the service-pic`s inside sp-* logical interface are represented as output packets, and the packets leaving the service-pic`s outside sp- logical interface towards the egress PFE are represented as input packets.
Inside interface
- Packets leave the ingress PFE and enter the service PIC for processing.
- Counters are reported from the PFE`s perspective.
lab@white# run show interfaces sp-1/2/0.1 extensive
Jun 15 06:04:14
Logical interface sp-1/2/0.1 (Index 72) (SNMP ifIndex 671) (Generation 137)
Flags: Point-To-Point SNMP-Traps Encapsulation: Adaptive-Services
Traffic statistics:
Input bytes : 0
Output bytes : 1408
Input packets: 0
Output packets: 11
Local statistics:
Input bytes : 0
Output bytes : 0
Input packets: 0
Output packets: 0
Transit statistics:
Input bytes : 0 0 bps
Output bytes : 1408 0 bps <- Bytes entering
Input packets: 0 0 pps
Output packets: 11 0 pps <- Packets entering
Protocol inet, MTU: 9192, Generation: 146, Route table: 0
Flags: Sendbcast-pkt-to-re, Receive-options, Receive-TTL-Exceeded
Inside interface
- Processed packets leave the service PIC towards the egress PFE.
- Counters are reported from the PFE`s perspective.
lab@white# run show interfaces sp-1/2/0.2 extensive
Jun 15 06:04:09
Logical interface sp-1/2/0.2 (Index 73) (SNMP ifIndex 672) (Generation 138)
Flags: Point-To-Point SNMP-Traps Encapsulation: Adaptive-Services
Traffic statistics:
Input bytes : 2024
Output bytes : 0
Input packets: 11
Output packets: 0
Local statistics:
Input bytes : 0
Output bytes : 0
Input packets: 0
Output packets: 0
Transit statistics:
Input bytes : 2024 0 bps <- Bytes leaving
Output bytes : 0 0 bps
Input packets: 11 0 pps <- Packets leaving
Output packets: 0 0 pps
Protocol inet, MTU: 9192, Generation: 147, Route table: 0
Flags: Sendbcast-pkt-to-re, Receive-options, Receive-TTL-Exceeded