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# IP Features

The E-series router supports the following IP features:

- Internet Control Message Protocol (ICMP)
- Traceroute
- User Datagram Protocol (UDP)
- Transmission Control Protocol (TCP)
- Classless interdomain routing (CIDR)
- Maximum transmission unit (MTU)
- Support for simultaneous multiple logical IP stacks on the same router
- Flexible IP address assignment to support any portion of a physical interface (for example, a channel or circuit), exactly one physical interface, or multilink PPP interfaces
- Packet segmentation and reassembly
- Loose source routing to specify the IP route
- Strict source routing to specify the IP route for each hop
- Record route to track the route taken
- Internet timestamp
- Broadcast addressing, both limited broadcast and directed broadcast
- Support for 32,000 discrete, simultaneous IP interfaces per router to support thousands of logical connections
- Capability of detecting and reporting changes in the up or down state of any IP interface
- IP policy support. See JUNOSe IP Services Configuration Guide, for more information about policy configuration.
- Indirect next hops
- IP tunnel routing tables

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