Technical data

Brocade MLX Series and NetIron Family Documentation Updates 19
53-1002805-03
sFlow null0 sampling
1
sFlow null0 sampling
TABLE 6 Supported devices for sFlow null0 sampling
This feature allows Brocade devices to sample null0 dropped packets. You will find this useful in
cases such as DOS attack on a particular route.
Configuring steps
1. Enable sFlow.
2. Enable null0 sampling .
3. Configure null0 routes.
NOTE
Above commands can be performed in any order.
Feature highlights
• By default, null0 sFlow sampling feature is disabled.
• IPv4, IPv4-VPN, IPv6 null0 routes can be sFlow sampled.
• Only explicitly configured null0 routes can be sFlow sampled. Implicit null0 drops cannot be
sFlow sampled.
Limitations
• When this feature is enabled, due to sampling of more packets (discarded packets) than the
usual number till now, the actual sampling rate for regular streams will be reduced.
• This feature does not support PBR related null0 drops.
• This feature does not support default null0 route drops.
Backward compatibility
The current sFlow functionalities and ACL based sFlow functionalities will co-exist with this feature.
As the dropped packets hit the traffic manager (TM), if mirroring is enabled on that port, these
dropped packets will also get mirrored.
Features
supported
Brocade
NetIron
XMR Series
Brocade
MLX Series
Brocade
NetIron CES
2000 Series
BASE
package
Brocade
NetIron CES
2000 Series
ME_PREM
package
Brocade
NetIron CES
2000 Series
L3_PREM
package
Brocade
NetIron CER
2000 Series
BASE
package
Brocade
NetIron CER
2000 Series
Advanced
Services
package
sFlow null0
sampling
Yes Yes No No No No No