Cisco ASR 920 series Configuration Guide Ethernet Router

Traffic Directions
Ingress SPAN (Rx) copies network traffic received by the source interfaces for analysis at the destination
interface. Egress SPAN (Tx) copies network traffic transmitted from the source interfaces to the destination
interface. Specifying the configuration option (both) copies network traffic received and transmitted by the
source interfaces to the destination interface.
The following table lists the supported traffic types for RSPAN.
Table 21: RSPAN Traffic
BothEgress Mirror (Tx)Ingress Mirror (Rx)Source
SupportedSupportedSupportedLayer2 or Layer3
Not supportedNot supportedSupportedVLAN
Not supportedNot supportedNot supportedEFP
Not supportedNot supportedNot supportedPseudowire
The following table lists the supported rewrite traffic for RSPAN on the EFP, Trunk with the associated
RSPAN bridge domains.
Table 22: Rewrite Traffic for RSPAN BD
EFP/Trunk associated with RSPAN
BD
SourceRewrite Operations
Only Pop1Pop1, Pop2, Push1no-rewrite
The following tables lists the format of the spanned packets at the destination port for both Ingress and Egress
RSPAN. The tables lists the formats of untagged, single, and double tagged source packets for EFPs under
source port configured with rewrite operations (no-rewrite, pop1, pop2 and push1).
Table 23: Destination Port Ingress and Egress Spanned Traffic for EVC RSPAN BD
Egress TrafficIngress Traffic
RSPAN Vlan (BD) rewrite pop1
tag symmetric
RSPAN Vlan (BD) rewrite pop1
tag symmetric
(Untagged Traffic) - Source port
rewrite
RSPAN BD tag + packetRSPAN BD tag + packetno-rewrite
NANApop1 tag
NANApop2 tag
Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)
386
Configuring Switched Port Analyzer
Traffic Directions

Cisco ASR 920 series Specifications

General

Brand	Cisco
Model	ASR 920 series
Category	Network Router
Language	English