D.S. Alexander, et al., Active network encapsulation protocol (ANEP), http://www.cis.upenn.edu/switchware/ANEP/docs/ANEP. txt, 1997.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....are injected into the network by Applications and forwarded to their destination with customized routines. Each time a capsule enters an active node, it is treated according to the specifications defined in its own code. In our implementation we also use the Active Network Encapsulation Protocol [11] to provide another mechanism for routing user packets to particular EEs. The ANEP header includes a Type ID field which are assigned to specific execution environments. If a particular EE or various EEs are present at a node, packets containing a valid ANEP header with the appropriate Type ID ....

ALEXANDER D. S., et al., Active Network Encapsulation Protocol , Draft, DARPA AN Working Group, July 1997.

....IP options typically results in a packet experiencing lower quality processing throughout the whole of the path it traverses; packets with options set tend to be queued with lower priority, due to the extra complexity that they present to a router. The Active Network Encapsulation Protocol (ANEP) Alexander97a] has been proposed as a more flexible mechanism than IP options for encapsulating active network packets for transmission over di#erent lower level media and protocols. It supports the multiplexing of packets from multiple execution environments (EEs) over a single channel. In [Bhattacharjee97] ....

....make it more straightforward to use multiple EEs on a single node: 144 . The Active Network Backbone (ABone) ABone] permits multiple EEs to run on a single Unix node as separate processes. The Active Network Daemon [SRI99] receives packets in the Active Network Encapsulation Protocol (ANEP) Alexander97a] and demultiplexes the packets to the relevant EEs. The NodeOS [Peterson00a] aims to provide a low level operating system style interface suitable for implementing active network EEs. In both of these e#orts, the main resource principal is the EE an EE is a program that controls resources ....

D. Scott Alexander, Bob Braden, Carl A. Gunter, Alden W. Jackson, Angelos D. Keromytis, Gary J. Minden, and David Wetherall. Active Network Encapsulation Protocol (ANEP). http://www.cis.upenn.edu/ ~switchware/ANEP/docs/ANEP.txt, August 1997. (pp 22, 145)

....the granularity of per LSR within each LSP. The result is that when setting up a LSP, it is possible to also set up the use of APN for that LSP. This incurs additional setup overhead but can eliminate the need for per packet overhead. It is also possible to support per hop approaches such as ANEP[15]. To support ANEP, every label operation must include i APN, which invokes a handler that understands the semantics of the particular reference approach, e.g. a handler that understands ANEP looks into IP s protocol identifier field to check for ANEP packets. If the packet is ANEP, it will be ....

D. Alexander, B. Braden, C. Gunter, A. Jackson, A. Keromytis, and G. Minden, "Active Network Encapsulation Protocol," http://www.cis.upenn.edu/switchware/ANEP/docs/ANEP.txt, 1997.

....APN on APLS The standard problems when designing APN architectures is to identify active packets(packets that needs special processing) and also identifying which Execution Environment (EE) to serve the active packet. Various prominent solutions are shown below. Reference approach: ANEP Protocol[24] uses Protocol Identifier field in IP header to identify ANEP packet. The ANEP is a protocol designed for APN support. It includes a Type ID field to demultiplex between different EEs (different APN architecture) Nygren et al. 25] and Wetherall et al. 26] use a similar approach which uses some ....

D. Alexander, B. Braden, C. Gunter, A. Jackson, A. Keromytis, and G. Minden, "Active Network Encapsulation Protocol," http ://www. cis. upenn. edu/~switchware/A NEP/docs/A NEP. txt, 1997.

....and functions provided by those modules. Packet Format Packets, which contain executable code, can use the same basic header as packets, which only have to be processed by some active component. To avoid as much overhead as possible, this header is much simpler and shorter than an ANEP header [1]. This increases the performance of packet processing by service handlers, and leaves the processing of more sophisticated header fields, which are required for executable packets, to the Python based core. UDP Header IP Header Code Block Source Port Length Destination Port Checksum ....

D.S. Alexander. Active network encapsulation protocol. CIS, University of Pennsylvania, http://www.cis.upenn.edu/ switchware/ANEP/, August 2002.

....approach is to use a transport protocol independent of the technology used (i.e. the protocol can be placed over Ethernet, IP or UDP) and that ensures interoperability with existing networks. Two protocols have been proposed in that direction: the Active Network Encapsulation Protocol (ANEP) [11] and the Simple Active Packet Format (SAPF) 12] 2.2.1 Active Network Encapsulation Protocol ANEP is a protocol for encapsulation of active network frames, designed to provide the capability to identify the different evaluation environments, and to allow minimal, default processing of packets ....

ALEXANDER, D., et al, "Active Network Encapsulation Protocol", Draft, July 1997. Available at http://www.cis.upenn.edu/~switchware/ANEP/.

....and integrated approaches, have been introduced to create active networks. With the discrete approach, e.g. ANTS [20] CANES [4] DAN [10] the programs are injected into the nodes from the actual data packets traversing through network nodes. With integrated approach, e.g. IP Option [22] ANEP [1], Smart Packet [17] every message can be treated as a program. A message (so called capsule) contains a program fragment that may include embedded data to traverse network nodes. In addition, a mixed approach of these two, e.g. SwitchWare [2] NetScript [9] has also been proposed. However, ....

D. S. Alexander, et al. Active Network Encapsulation Protocol (ANEP). In RFC Draft, July 1997.

....patterns, channel creation requests that specify other than best effort scheduling are subject to node security policy. 4.3 Active Network Encapsulation Protocol Some means is required to allow users to control the routing of packets to a particular EE. The Active Network Encapsulation Protocol [ANEP] provides this capability. The ANEP header includes a Type Identifier field; well known Type IDs are assigned to specific execution environments. Presently this assignment is handled by the Active Network Assigned Number Authority. If a particular EE is present at a node, packets containing a ....

D. Alexander et al, Active Network Encapsulation Protocol. Draft, July 1997. Available at http://www.cis.upenn.edu/ switchware/ANEP/.

.... (FPGA) 9] and active router line cards [10] Active processing chips with multiple processors, cache, and memory on a single ASIC have been proposed [11] On the protocol level, only one solution for active networks has been proposed sofar, the ActiveNetwork Encapsulation Protocol (ANEP) [12]. ANEP works on top of IPv4 IPv6 and provides the following functionally: ffl Demultiplexing of packets to their correspondingEE, ffl Minimal default processing for packets for which the intended EE is unavailable, ffl Storage space in the ANEP header for information that conceptually or ....

....actual processingtime, since the system is performing other tasks during that time. Also included is an active processing time of roughly 150 cycles. This comparison shows that SAPF requires 30 less processing time over IP ANEP. V. Related Work The Active Network Encapsulation Protocol (ANEP) [12] is the de facto standard for active packets over IP.It encapsulates the activepayload with a header that contains a version number, a flagfield, an identifier that indicates the active processingengine, a headerlength, and a packet length field. ANEP also allows for multiple ....

S. Alexander, B. Braden, C. Gunter, A. Jackson, A. Keromytis, G. Minden, and G. Wetherall, "Active network encapsulation protocol( RFC Draft, http://www.cis.upenn.edu/~switchware/ANEP/docs/ANEP.txt

....and upgrade new network services and to spread them throughout an active network. ANTS[37] a prototype active network architecture from MIT, provides on demand, Javabased code distribution. Active packets can be encapsulated in an IP packet using the Active Network Encapsulation Protocol (ANEP)[1] thereby making them transparent to network nodes that do not support them. This will allow the gradual deployment of active routing elements into the Internet. Non active network nodes will simply ignore the active fields (since they are invisible to them) The Option Type field in an ANEP header ....

D. S. Alexander, B. Braden, and C. A. Gunter. Active Network Encapsulation Protocol (ANEP). Active Networks Group, RFC Draft, July 1997.

....programs, the network is no longer restricted to packet delivery alone and this creates opportunities for optimized solutions to a number of problems that arise in distributed systems. Active packets can be encapsulated within an IP packet using the Active Network Encapsulation Protocol (ANEP) [1] thereby making them transparent to network nodes 5 Version Flag TypeID ANEP Header Len ANEP Packet Len Options Payload Option Type Option Length Option Payload Figure 1: Format of an ANEP header that do not support active packets. This will allow the gradual deployment of active routing ....

D. Scott Alexander, Bob Braden, and Carl A. Gunter. Active Network Encapsulation Protocol (ANEP). Active Networks Group, RFC Draft, July 1997.

....some different security solutions in the PN research area depending on their specific level of abstraction. Some approaches in the AN area suggest the adoption of security mechanisms at the network layer. They usually tend to standardize security data by directly enclosing them into packets [5] [6] Other approaches propose solutions at a higher level of abstraction, to exploit the flexibility and extensibility typical of the application layer [3] On the one hand, network layer approaches focus on efficiency but often lack flexibility and dynamicity. On the other hand, ....

....of the AgentBased Security Architecture for the Active Network Infrastructure (ABSANI) developed at the GMD Fokus [3] 3. 1 Security Data within PN Packets Several research efforts have addressed the issue of defining new formats for network packets to include security relevant information [5] [6] These activities propose a structure of packets that permits efficient security processing at packet forwarding reception, on the basis of the security data contained in packet headers. The most recognized work toward the standardization of the PN packet format is the Active Network ....

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Alexander, D.S., et al.: Active Network Encapsulation Protocol (ANEP). RFC draft (1997)

....environment allows any type of information to be stored in SmallState including Java objects; the Receive Queue is a Java object maintaining active virtual message ordering and scheduling. Packets are encapsulated inside Magician SmartPackets following the Active Network Encapsulation Protocol [1] format. Once a virtual message leaves the Receive Queue, the virtual time of the logical process, known as Local Virtual Time, is updated to the value of the Receive Time of that virtual message. Virtual messages ultimately originate from Driving Processes, shown in the virtual overlay of Figure ....

D. S. Alexander, B. Braden, C. Gunter, A. Jackson, A. Keromytis, G. Minden, and D. Wetherall, editors. Active Network Encapsulation Protocol (ANEP). Active Networks Group, July 1997. Request for Comments: draft.

....architecture such as ANTS. Presently an AIPv6 node supports the essential portions of the IPv6 protocol which has made it easy to integrate Active Network functionality, and will make it easy to study and add security measures to the system. 2.3. 3 An ActiveBONE There presently is a proposal [3] to build a test Active Network within the Internet. This network would have similar characteristics to the 6Bone and MBONE, two virtual networks set up to test the IPv6 and Multicast protocols respectively. Both of those test networks connect two disjoint networks by tunneling through IPv4. The ....

D. Scott Alexander et al. Active Network Encapsulation Protocol (ANEP) RFC. July 1997.

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D. Alexander, B. Braden, C. Gunter, A. Jackson, G. Minden, and D. Wetherall. Active Network Encapsulation Protocol (ANEP). Technical report, Active Networks Group, July 1997.

....demonstrated bridging throughput of 57 Mbps [2] when bridging two 100 Mbps Ethernets. Please see the references for further details. 9.2 Active Packets For active packets to be processed in alien, a set of libraries must be loaded to receive and process the packets. Our active packets are ANEP [19] encapsulated (and currently UDP encapsulated for convenience) as shown in Fig. 2. Thus, the rst of the libraries receives an ANEP packet and performs header processing including determination of the execution environment for the packet. Also, some authentication can occur at this level as ....

D. Scott Alexander, Bob Braden, Carl A. Gunter, Alden W. Jackson, Angelos D. Keromytis, Gary J. Minden, and David Wetherall. Active network encapsulation protocol (ANEP). http://www.cis.upenn.edu/~angelos/ANEP.txt.gz, August 1997.

....(and for network management, super uous) features, like le system access and memory management. Figure 1 shows the Smart Packets system architecture. User written network management and monitoring programs generate smart packets encapsulated in Active Network Encapsulation Protocol (ANEP) [Alexander et al. 1997] frames and give them to the ANEP Daemon process. The daemon injects the smart packet into the network, where the smart packet is sent in either an end to end or a hopby hop mode. In end to end mode, the program is executed only at the destination. In hop by hop mode, the program is executed at ....

Alexander, D. S., Braden, B., Gunter, C. A., Jackson, A. W., Keromytis, A. D., Minden, G. J., and Wetherall, D. 1997. Active Network Encapsulation Protocol (ANEP). http://www.cis.upenn.edu/~switchware/ANEP/docs/ANEP.txt.

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D.S. Alexander, et al., Active network encapsulation protocol (ANEP), http://www.cis.upenn.edu/switchware/ANEP/docs/ANEP. txt, 1997.

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S. Alexander et al. Active Network Encapsulation Protocol (ANEP). RFC Draft, Category: Experimental, http://www.cis. upenn.edu/switchware/ANEP/, July 1997.

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D. Scott Alexander, Robert Braden, Carl A. Gunter, Alden W. Jackson, A. D. Keromytis, Gary. J. Minden, and David J. Wetherall. Active Network Encapsulation Protocol (ANEP). Internet draft, Internet Engineering Task Force, July 1997.

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S. Alexander, C. Gunter, and D. Wetherall. Active network encapsulation protocol, August 1997. http://www/cis.upenn.edu/ switchware /ANEP.

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ALEXANDER D., BRADEN B., GUNTER C., JACKSON A., KEROMYTIS A.MINDEN G.AND WETHERALL D., Active Network Encapsulation Protocol (ANEP), RFC Draft, 1997.

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D. Alexander et al, Active Network Encapsulation Protocol. Draft, July 1997. Available at http://www.cis.upenn.edu/ switchware/ANEP/.

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D. Alexander et al, \Active Network Encapsulation Protocol, Draft," July 1997. available online at http://www.cis.upenn.edu/switchware/ANEP.

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D.S. Alexander et al. Active Network Encapsulation Protocol (ANEP). Active Network Working Group Draft, July 1997.

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