Overview of Simple Filters

Simple filters are recommended for metropolitan Ethernet applications. They are supported on Gigabit Ethernet intelligent queuing 2 (IQ2) and Enhanced Queuing Dense Port Concentrator (DPC) interfaces only.

Unlike normal filters, simple filters are for IPv4 traffic only and have the following restrictions:

• The next term action is not supported.
• Qualifiers, such as the except and protocol-except statements, are not supported.
• Noncontiguous masks are not supported.
• Multiple source addresses and destination addresses in a single term are not supported. If you configure multiple addresses, only the last one is used.
• Ranges are only valid as source or destination ports. For example, source-port 400-500 or destination-port 600-700.
• Output filters are not supported. You can apply a simple filter to ingress traffic only.
• Simple filters are not supported for interfaces in an aggregated-Ethernet bundle.
• Explicitly configurable terminating actions, such as accept, reject, and discard, are not supported. Simple filters always accept packets.

  Note: On the MX Series routers with the Enhanced Queuing DPC, the forwarding class is not supported as a from match condition.