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gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English We can also use the packet traces that were collected by tcpdump_ to observe the packets that the OSPFv3 daemons exchange. OSPFv3 is a more complex protocol that the basic link state protocol that we have described in this book, but you should be able to understand some of these packets. The packet traces are available as :download:`/exercises/traces/ospf6-r1-trace.pcap`, :download:`/exercises/traces/ospf6-r2-trace.pcap` and :download:`/exercises/traces/ospf6-r3-trace.pcap`. Here are a few interesting packets collected on router ``r1``. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English In its output, we see that ``r1`` is attached to two different routers. Finally, the ``show ipv6 ospf6 database`` returns the full OSPFv3 database with all the link state information that was distributed by OSPFv3. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English The ``show ipv6 ospf6`` command reports the general state of the OSPFv3 daemon. The ``show ipv6 ospf6 neighbor`` command reports the state of the connected neighbors. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English The password to access this daemon is `zebra`. It supports various commands that are described in the `FRRouting documentation <http://docs.frrouting.org/en/latest/ospf6d.html#showing-ospf6-information>`_ We briefly illustrate some of them below. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English We can also connect to the OSPFv3 daemon running on the routers to observe its state. For this, we use the ``noecho r1 telnet localhost ospf6d`` command. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English We can easily verify that the paths used to forward packets are the expected ones according to the configured IGP weights. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English The script starts the routers and hosts. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English Finally, we can start the IPMininet_ topology and launch the daemons. The entire script is available from :download:`/exercises/ipmininet_scripts/ospf6.py`. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English We use this mininet_ topology to collect packet traces that show the packets that OSPF routers exchange. For this, we add the following ``post_build`` method that IPMininet_ starts after having constructed the network and before launching the daemons. It simply starts tcpdump_ on each router to collect the first 100 OSPF packets that they send/receive. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English The code is very simple as by default IPMininet_ enables OSPF on routers. We introduce two specific parameters. First, the interface that connects a router to a host is flagged as a passive interface (``igp_passive=True``). This indicates to the router that there are no other routers attached to this interface and that it should not send or accept OSPF Hello messages on this interface. The second configuration parameter is that we set the IGP cost on each link. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English We first use IPMininet_ to explore the operation of OSPFv3, the version of OSPF that supports IPv6. We create a simple network with three routers and two hosts as shown in the figure below. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English Exploring OSPF French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English Routing protocols play a key role in the Internet since they ensure that all the routers have valid routing tables. In this section, we use IPMininet_ to explore how intradomain and interdomain routing protocols work in practice. IPMininet_ adds an abstraction layer above the actual configuration of the FRRouting daemons that implement these routing protocols. French 0 characters edited Current translation State: Empty a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols French	English Exploring routing protocols French 0 characters edited Current translation State: Translated Découverte des protocoles de routage a month ago
gegoa Resource updated cnp3-ebook exercises/routing-protocols English	The “`locale/pot/exercises/routing-protocols.pot`” file was changed. a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols English	English We now disable the interdomain link between ``AS3`` and ``AS4``. What are the hosts that ``AS1``, ``AS5`` and ``AS6`` are still able to ping ? English 0 characters edited Current translation State: Read-only We now disable the interdomain link between ``AS3`` and ``AS4``. What are the hosts that ``AS1``, ``AS5`` and ``AS6`` are still able to ping ? a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols English	English What is the path that packets follow from a host attached to ``AS2`` to a host attached to ``AS7`` ? English 0 characters edited Current translation State: Read-only What is the path that packets follow from a host attached to ``AS2`` to a host attached to ``AS7`` ? a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols English	English What is the path that packets follow from a host attached to ``AS8`` to a host attached to ``AS2`` ? English 0 characters edited Current translation State: Read-only What is the path that packets follow from a host attached to ``AS8`` to a host attached to ``AS2`` ? a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols English	English What is the path that packets follow from a host attached to ``AS8`` to a host attached to ``AS1`` ? English 0 characters edited Current translation State: Read-only What is the path that packets follow from a host attached to ``AS8`` to a host attached to ``AS1`` ? a month ago
gegoa String updated in the repository cnp3-ebook exercises/routing-protocols English	English What is the path that packets follow from a host attached to ``AS1`` to a host attached to ``AS8`` ? English 0 characters edited Current translation State: Read-only What is the path that packets follow from a host attached to ``AS1`` to a host attached to ``AS8`` ? a month ago

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