RSPAN
•
Before configuring RSPAN sessions, you must first configure:
1
Source interface
2
Destination BD
•
MAC learning should be disabled using the mac-address-table limit
[rspan vlan/bd
] maximum num
action limit command before configuring the RSPAN VLAN.
•
RSPAN VLAN must be dedicated and entire Layer 2 devices in the network must be aware of the VLAN.
•
RSPAN source and destinations switches separated by the VPLS pseudowire must be aware of the
RSPAN VLAN/ brige domain (BD).
•
Pseudowire must be dedicated for RSPAN traffic.
•
The RSPAN destination session is not required when the destination switch is connected to source switch
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.
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 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
ingress sessions and up to 12 egress sessions.
•
Only one local SPAN destination interface is supported. You
cannot
configure a local SPAN destination
interface to receive ingress traffic.
•
Outgoing Cisco Discovery Protocol (CDP) and Bridge Protocol Data Unit (BPDU) packets are not
replicated.
•
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
by default.
•
Local SPAN destinations never participate in any spanning tree instance. Local SPAN includes BPDUs
in the monitored traffic, so any BPDUs seen on the local SPAN destination are from the local SPAN
source.
•
Local SPAN sessions with overlapping sets of local SPAN source interfaces or VLANs are
not
supported.
Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)
382
Configuring Switched Port Analyzer
Restrictions for Local Span and RSPAN
Содержание ASR 920 series
Страница 2: ... 2014 Cisco Systems Inc All rights reserved ...
Страница 273: ...Carrier Ethernet Configuration Guide Cisco ASR 920 Series 255 Configuring Ethernet CFM Designing CFM Domains ...
Страница 302: ...Carrier Ethernet Configuration Guide Cisco ASR 920 Series 284 Configuring Ethernet CFM Glossary ...