Restrictions For Local Span And Rspan - Cisco NCS 4200 Series Configuration Manual

Restrictions for Local Span and RSPAN

• The RSPAN destination session is not required when the destination switch is connected to source switch
Restrictions for Local Span and RSPAN
Local Span
• Local SPAN is only supported on physical ports.
• SPAN monitoring of port-channel interfaces or port-channel member-links is not supported.
• Combined Egress local SPAN bandwidth supported on Cisco ASR 900 Series RSP2 module is 1 GB.
• Local SPAN is not supported on logical interfaces such as Vlans or EFPs.
• Up to 14 active local SPAN sessions (ingress and egress) are supported. The router supports up to 14
• Only one local SPAN destination interface is supported. You cannot configure a local SPAN destination
• Outgoing Cisco Discovery Protocol (CDP) and Bridge Protocol Data Unit (BPDU) packets are not
• When enabled, local SPAN uses any previously entered configuration.
• When you specify source interfaces and do not specify a traffic direction (Tx, Rx, or both), both is used
• The SPAN port does not work for Rx traffic on the pseudowire for interfaces, when the SPAN port is
• Local SPAN destinations never participate in any spanning tree instance. Local SPAN includes BPDUs
• Local SPAN sessions with overlapping sets of local SPAN source interfaces or VLANs are not supported.
RSP3 module
• Destination port of SPAN session, cannot be used for other network data traffic flow.
• Multiple destinations for same SPAN session is not supported on the Cisco ASR 900 Series RSP3
• Jumbo sized packets and bad CRC packets are not spanned.
• Combined Egress local SPAN bandwidth supported is about 100GB depending on other traffic on the
• Port-channel cannot be used as the SPAN destination.
Layer 2 Configuration Guide for Cisco NCS 4200 Series
8
through Layer2 VPN. Thus, in the destination switch, the destination port must configured with the
service instance with encapsulation as RSPAN VLAN/BD and bridge domain as RSPAN VLAN/BD
and the MAC address learning should be disabled on RSPAN BD/VLAN.
ingress sessions and up to 12 egress sessions.
interface to receive ingress traffic.
replicated.
by default.
in different ASIC of the RSP2 module.
in the monitored traffic, so any BPDUs seen on the local SPAN destination are from the local SPAN
source.
module.
internal recycle interface.
Configuring Switched Port Analyzer