Dell S3048-ON, Configuration Manual

Page: 603 / 1036

EXEC Privilege mode
show run monitor session
Dell#show run monitor session
!
monitor multicast-queue 7
Dell#
Enabling Flow-Based Monitoring
Flow-based monitoring conserves bandwidth by monitoring only specified traffic instead of all traffic on the interface. This feature is
particularly useful when looking for malicious traffic. It is available for Layer 3 ingress traffic. You can specify traffic using standard or
extended access-lists.
NOTE: Flow-based monitoring is supported for known unicast egress traffic.
1 Create a monitoring session.
CONFIGURATION mode
monitor session session-id
2 Enable flow-based monitoring for a monitoring session.
MONITOR SESSION mode
flow-based enable
3 Specify the source and destination port and direction of traffic.
MONITOR SESSION mode
source source—port destination destination-port direction rx
4 Define IP access-list rules that include the
monitor
keyword. For port monitoring, Dell Networking OS only considers traffic matching
rules with the
monitor
keyword.
CONFIGURATION mode
ip access-list
To define access lists, see the Access Control Lists (ACLs) chapter.
5 Allocate a CAM region so that you can apply the ACL you created to the monitoring session.
CONFIGURATION mode
cam-acl l2acl number ipv4acl number ipv6acl number ipv4qos number l2qos number l2pt number
ipmacacl number vman-qos number ipv4mirracl number
6 Apply the ACL to the monitored port.
MONITOR SESSION mode
ip access-group access-list-name
Example of the
flow-based enable
command with ACL applied on the interface
To view an access-list that you applied to an interface, use the
show ip accounting access-list
command from EXEC Privilege
mode.
Dell(conf)#monitor session 0
Dell(conf-mon-sess-0)#flow-based enable
Dell(conf)# ip access-list ext testflow
Dell(config-ext-nacl)#seq 5 permit icmp any any count bytes monitor
Dell(config-ext-nacl)#seq 10 permit ip 102.1.1.0/24 any count bytes monitor
Dell(config-ext-nacl)#seq 15 deny udp any any count bytes
Dell(config-ext-nacl)#seq 20 deny tcp any any count bytes
Dell(config-ext-nacl)#exit
Port Monitoring 603