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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.
 
9 months ago
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Exploring routing protocols
Découverte des protocoles de routage
9 months ago
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The “locale/pot/exercises/routing-protocols.pot” file was changed. 9 months ago
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We now disable the interdomain link between ``AS3`` and ``AS4``. What are the hosts that ``AS1``, ``AS5`` and ``AS6`` are still able to ping ?
We now disable the interdomain link between ``AS3`` and ``AS4``. What are the hosts that ``AS1``, ``AS5`` and ``AS6`` are still able to ping ?
9 months ago
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What is the path that packets follow from a host attached to ``AS2`` to a host attached to ``AS7`` ?
What is the path that packets follow from a host attached to ``AS2`` to a host attached to ``AS7`` ?
9 months ago
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What is the path that packets follow from a host attached to ``AS8`` to a host attached to ``AS2`` ?
What is the path that packets follow from a host attached to ``AS8`` to a host attached to ``AS2`` ?
9 months ago
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What is the path that packets follow from a host attached to ``AS8`` to a host attached to ``AS1`` ?
What is the path that packets follow from a host attached to ``AS8`` to a host attached to ``AS1`` ?
9 months ago
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What is the path that packets follow from a host attached to ``AS1`` to a host attached to ``AS8`` ?
What is the path that packets follow from a host attached to ``AS1`` to a host attached to ``AS8`` ?
9 months ago
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The network does not provide a full connectivity. The hosts attached to ``AS5`` cannot ping the hosts attached to ``AS8``.
The network does not provide a full connectivity. The hosts attached to ``AS5`` cannot ping the hosts attached to ``AS8``.
9 months ago
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Let us now consider another example, also implemented using an IPMininet_ script. The network contains eight ASes with one host per AS. This small Internet is shown below and the script is available from :download:`/exercises/ipmininet_scripts/ebgp-bug-3.py`.
Let us now consider another example, also implemented using an IPMininet_ script. The network contains eight ASes with one host per AS. This small Internet is shown below and the script is available from :download:`/exercises/ipmininet_scripts/ebgp-bug-3.py`.
9 months ago
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What is the Loc-RIB of ``AS8`` for prefix `p2` ? Indicate which is the best route towards this prefix.
What is the Loc-RIB of ``AS8`` for prefix `p2` ? Indicate which is the best route towards this prefix.
9 months ago
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What is the Loc-RIB of ``AS6`` for prefix `p1` ? Indicate which is the best route towards this prefix.
What is the Loc-RIB of ``AS6`` for prefix `p1` ? Indicate which is the best route towards this prefix.
9 months ago
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The network below contains nine ASes with one host per AS. Assuming that ``AS1`` announces prefix `p1` and that ``AS2`` announces prefix `p2`.
The network below contains nine ASes with one host per AS. Assuming that ``AS1`` announces prefix `p1` and that ``AS2`` announces prefix `p2`.
9 months ago
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What is the Loc-RIB of ``AS9`` for prefix `p2` ? Indicate which is the best route towards this prefix.
What is the Loc-RIB of ``AS9`` for prefix `p2` ? Indicate which is the best route towards this prefix.
9 months ago
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What is the Loc-RIB of ``AS6`` for prefix `p9` ? Indicate which is the best route towards this prefix.
What is the Loc-RIB of ``AS6`` for prefix `p9` ? Indicate which is the best route towards this prefix.
9 months ago
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Let us now consider another example. The network contains nine ASes with one host per AS. Assuming that ``AS9`` announces prefix `p9` and that ``AS2`` announces prefix `p2`.
Let us now consider another example. The network contains nine ASes with one host per AS. Assuming that ``AS9`` announces prefix `p9` and that ``AS2`` announces prefix `p2`.
9 months ago
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What are the BGP messages that will be exchanged when the link between ``AS3`` and ``AS4`` fails ? How does this affect the reachability of the different hosts ?
What are the BGP messages that will be exchanged when the link between ``AS3`` and ``AS4`` fails ? How does this affect the reachability of the different hosts ?
9 months ago
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What are the BGP messages that will be exchanged when the link between ``AS1`` and ``AS5`` fails ? How does this affect the reachability of the different hosts ?
What are the BGP messages that will be exchanged when the link between ``AS1`` and ``AS5`` fails ? How does this affect the reachability of the different hosts ?
9 months ago
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What are the BGP messages that will be exchanged when the link between ``AS1`` and ``AS3`` fails ? How does this affect the reachability of the different hosts ?
What are the BGP messages that will be exchanged when the link between ``AS1`` and ``AS3`` fails ? How does this affect the reachability of the different hosts ?
9 months ago
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What are the BGP messages that will be exchanged when the link between ``AS1`` and ``AS2`` fails ? How does this affect the reachability of the different hosts ?
What are the BGP messages that will be exchanged when the link between ``AS1`` and ``AS2`` fails ? How does this affect the reachability of the different hosts ?
9 months ago

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