Enabling Flow-Based Monitoring - Dell Force10 Z9000 Configuration Manual

Enabling Flow-Based Monitoring

Flow-based monitoring is supported only on the S-Series platform.
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 2 and Layer 3 ingress and egress traffic. You can specify
traffic using standard or extended access-lists.
1. Enable flow-based monitoring for a monitoring session.
MONITOR SESSION mode
flow-based enable
2. Define in access-list rules that include the keyword monitor. For port monitoring, Dell Networking OS only considers traffic
matching rules with the keyword monitor.
CONFIGURATION mode
ip access-list
Refer to Access Control Lists
3. Apply the ACL to the monitored port.
INTERFACE mode
ip access-group access-list
Example of the flow-based enable Command
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
Dell(conf)#interface tengigabitethernet 1/1
Dell(conf-if-te-1/1)#ip access-group testflow in
Dell(conf-if-te-1/1)#show config
!
interface TenGigabitEthernet 1/1
ip address 10.11.1.254/24
ip access-group testflow in
shutdown
Dell(conf-if-te-1/1)#exit
Dell(conf)#do show ip accounting access-list testflow
!
Extended Ingress IP access list testflow on TenGigabitEthernet 1/1
Total cam count 4
seq 5 permit icmp any any monitor count bytes (0 packets 0 bytes)
seq 10 permit ip 102.1.1.0/24 any monitor 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
--------- ------ ----------- --------- ----
0 Te 1/1 Te 1/2
548
Port Monitoring
(ACLs).
rx interface Flow-based
Type
----