Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.14.1.0 - Page 142
Enabling Flow-Based Monitoring
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The show monitor session session-id command displays the Type field in the output, which indicates whether a particular session is enabled for flow-monitoring. Example Output of the show Command DellEMC# show monitor session 1 SessID Source Destination Dir TTL Drop Rate Gre-Protocol FcMonitor ----------- --- 1 Te 1/2 remote-ip rx 0 No N/A N/A yes DellEMC# Mode ---Port Source IP --------- 0.0.0.0 Dest IP -------0.0.0.0 The show config command has been modified to display monitoring configuration in a particular session. DSCP ---- 0 Example Output of the show Command The show ip accounting commands have been enhanced to display whether monitoring is enabled for traffic that matches with the rules of the specific ACL. Example Output of the show Command DellEMC# show ip accounting access-list ! Extended Ingress IP access list kar on TenGigabitEthernet 1/1 Total cam count 1 seq 5 permit ip 192.168.20.0/24 173.168.20.0/24 monitor DellEMC#show ipv6 accounting access-list ! Ingress IPv6 access list kar on TenGigabitEthernet 1/1 Total cam count 1 seq 5 permit ipv6 22::/24 33::/24 monitor Enabling Flow-Based Monitoring Flow-based monitoring is supported on the S4820T 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 access-list rules that include the keyword monitor. Dell Networking OS only considers port monitoring traffic that matches rules with the keyword monitor. CONFIGURATION mode ip access-list For more information, see Access Control Lists (ACLs). 3 Apply the ACL to the monitored port. INTERFACE mode ip access-group access-list 142 Access Control Lists (ACLs)
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