Dell Force10 Z9000 - Flow-Based Monitoring

698 | Port Monitoring
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Flow-based Monitoring
Flow-based Monitoring is supported only on platform e
Flow-based monitoring conserves bandwidth by monitoring only specified traffic instead 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 may specify traffic using standard or extended access-lists.
To configure flow-based monitoring:
View an access-list that you applied to an interface using the command
show ip accounting access-list
from EXEC Privilege mode, as shown in Figure 32-8.
Figure 32-8. Configuring Flow-based Monitoring
Step Task Command Syntax Command Mode
4 Enable flow-based monitoring for a monitoring session. flow-based enable MONITOR SESSION
5 Define in an access-list rules that include the keyword
monitor. FTOS only considers for port monitoring traffic
matching rules with the keyword monitor.
See Chapter 6, Access Control Lists (ACLs).
ip access-list CONFIGURATION
6 Apply the ACL to the monitored port. See Chapter 6,
Access Control Lists (ACLs).
ip access-group
access-list
INTERFACE
FTOS(conf)#monitor session 0
FTOS(conf-mon-sess-0)#flow-based enable
FTOS(conf)#ip access-list ext testflow
FTOS(config-ext-nacl)#seq 5 permit icmp any any count bytes monitor
FTOS(config-ext-nacl)#seq 10 permit ip 102.1.1.0/24 any count bytes monitor
FTOS(config-ext-nacl)#seq 15 deny udp any any count bytes
FTOS(config-ext-nacl)#seq 20 deny tcp any any count bytes
FTOS(config-ext-nacl)#exit
FTOS(conf)#interface gig 1/1
FTOS(conf-if-gi-1/1)#ip access-group testflow in
FTOS(conf-if-gi-1/1)#show config
!
interface GigabitEthernet 1/1
ip address 10.11.1.254/24
ip access-group testflow in
shutdown
FTOS(conf-if-gi-1/1)#exit
FTOS(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 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)
FTOS(conf)#do show monitor session 0
SessionID Source Destination Direction Mode Type
--------- ------ ----------- --------- ---- ----