User Guide

OmniAccess SafeGuard OS Administration Guide
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Chapter 2: Accessing and Managing the System
directed to the analyzer that is attached to the other switching device. Ta ble 13 shows the
impact of frames traversing port ingress and egress with RSPAN enabled and disabled.
Table 13 RSPAN Ingress and Egress Frame Tagging
Figure 4 illustrates the packet frame data translation from ingress to egress.
NOTE: If RSPAN is enabled, the receiver should be configured to support
jumbo frames, since adding a VLAN tag to the ingress frame may result in a
jumbo frame being sent on the mirror port.
RSPAN Disabled
Ingress Frame Egress Frame
Untagged Untagged
802.1Q tagged 802.1Q tagged
Double Tagged (802.1Q in 802.1Q) Double Tagged (802.1Q in 802.1Q)
RSPAN Enabled
Ingress Frame Egress Frame
Untagged 802.1Q tagged (RSPAN VLAN)
802.1Q tagged 802.1Q in 802.1Q tagged (Outer RSPAN VlanId,
Inner original VlanId)
Double Tagged (802.1Q in 802.1Q) 3 tagged 802.1Q in 802.1Q tagged (Outer
RSPAN VID, Inner original VID