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Appendix - Classification Expressions
MDM9000 Satellite Modem
19.2.4 Expression: ip4 dst net 10.10.10.0/24 and Protocol icmp
The following picture shows the L3 expression "ip4 dst net 10.10.10.0/24 and protocol icmp".
Use this expression to capture ICMP messages and enabling to prioritize those messages (used
frequently as SLA reference).
The previous figure shows that IP traffic that complies to this expression, is forwarded towards the
remote site.
All other traffic is dropped (for this classification expression).
The following steps are taken:
Transmit
1. IP traffic is entering the MDM9000.
2. The traffic is inserted into the encapsulator.
3. The IP traffic is filtered according to the classification rule.
In this case "ip4 dst net 10.10.10.0/24 and protocol icmp", packets complying to this rule are
further processed by the shaping tree (Trafnode and Node Remote MDM4).
IP packets with an other destination IP address are dropped even as the IP packets with the
same IP address but without ICMP activated.
4. The shaped traffic is inserted into a channel (Channel Default).
5. A label can be assigned to the shaped traffic.
6. The shaped traffic is linked to a specific Input Stream Identifier (ISI8).
7. The shaped traffic is modulated and transmitted.
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