Dell S3048-ON, Configuration Manual

Page: 604 / 1036

Dell(conf)#interface gigabitethernet 1/1
Dell(conf-if-gi-1/1)# ip access-group testflow in
Dell(conf-if-gi-1/1)#show config
!
interface GigabitEthernet 1/1
ip address 10.11.1.254/24
ip access-group testflow in
shutdown
Dell(conf-if-gi-1/1)#exit
Dell(conf)#do show ip accounting access-list testflow
!
Extended Ingress IP access list testflow on GigabitEthernet 1/1
Total cam count 4
seq 5 permit icmp any any 53 monitor 53 count bytes (0 packets 0 bytes)
seq 10 permit ip 102.1.1.0/24 any monitor 53 count bytes (0 packets 0 bytes)
seq 15 deny udp any any count bytes (0 packets 0 bytes)
seq 20 deny tcp any any count bytes (0 packets 0 bytes)
Dell(conf)#do show monitor session 0
SessionID Source Destination Direction Mode Source IP Dest IP DSCP TTL Drop Rate
Gre-Protocol FcMonitor
--------- ------ ----------- --------- ---- --------- -------- ---- --- ---- ----
----------- ---------
0 Gi 1/1 Te 1/2 rx interface 0.0.0.0 0.0.0.0 0 0 No N/
A N/A yes
Remote Port Mirroring
While local port monitoring allows you to monitor traffic from one or more source ports by directing it to a destination port on the same
switch/router, remote port mirroring allows you to monitor Layer 2 and Layer 3 ingress and/or egress traffic on multiple source ports on
different switches and forward the mirrored traffic to multiple destination ports on different switches.
Remote port mirroring helps network administrators monitor and analyze traffic to troubleshoot network problems in a time-saving and
efficient way.
In a remote-port mirroring session, monitored traffic is tagged with a VLAN ID and switched on a user-defined, non-routable L2 VLAN. The
VLAN is reserved in the network to carry only mirrored traffic, which is forwarded on all egress ports of the VLAN. Each intermediate
switch that participates in the transport of mirrored traffic must be configured with the reserved L2 VLAN. Remote port monitoring
supports mirroring sessions in which multiple source and destination ports are distributed across multiple switches
Remote Port Mirroring Example
Remote port mirroring uses the analyzers shown in the aggregation network in Site A.
The VLAN traffic on monitored links from the access network is tagged and assigned to a dedicated L2 VLAN. Monitored links are
configured in two source sessions shown with orange and green circles. Each source session uses a separate reserved VLAN to transmit
mirrored packets (mirrored source-session traffic is shown with an orange or green circle with a blue border).
The reserved VLANs transport the mirrored traffic in sessions (blue pipes) to the destination analyzers in the local network. Two destination
sessions are shown: one for the reserved VLAN that transports orange-circle traffic; one for the reserved VLAN that transports green-
circle traffic.
604 Port Monitoring