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 1: RSPAN Traffic
Both
Egress Mirror (Tx)
Ingress Mirror (Rx)
Source
Supported
Supported
Supported
Layer2 or Layer3
Not supported
Not supported
Supported
VLAN
Not supported
Not supported
Not supported
EFP
Not supported
Not supported
Not supported
Pseudowire
The following table lists the supported
rewrite
traffic for RSPAN on the EFP, Trunk with the associated
RSPAN bridge domains.
Table 2: Rewrite Traffic for RSPAN BD
EFP/Trunk associated with RSPAN
BD
Source
Rewrite Operations
Only Pop1
Pop1, Pop2, Push1
no-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 3: Destination Port Ingress and Egress Spanned Traffic for EVC RSPAN BD
Egress Traffic
Ingress Traffic
RSPAN Vlan (BD) rewrite pop1
tag symmetric
RSPAN Vlan (BD) rewrite pop1
tag symmetric
(Untagged Traffic) - Source port
rewrite
RSPAN BD tag + packet
RSPAN BD tag + packet
no-rewrite
NA
NA
pop1 tag
NA
NA
pop2 tag
Layer 2 Configuration Guide for Cisco NCS 4200 Series
12
Configuring Switched Port Analyzer
Traffic Directions
