https://8bd9e53a.aww-3cz.pages.dev/tags/routes/ Recent content in Routes on Aaron's Worthless Words Hugo en Sat, 11 Jun 2011 00:00:00 +0000 https://8bd9e53a.aww-3cz.pages.dev/posts/2011/06/bgp-notes-backdoor-routes/ Sat, 11 Jun 2011 00:00:00 +0000 https://8bd9e53a.aww-3cz.pages.dev/posts/2011/06/bgp-notes-backdoor-routes/ <ul> <li>The fact that eBGP has an AD of 20 can be a problem. <ul> <li>You may have a very short path via EIGRP (or OSPF or RIP or whatever other IGP), but the longer eBGP path will be preferred.</li> </ul> </li> <li>For God&rsquo;s sake, do not lower the AD of EIGRP!  Havoc will ensue.</li> <li>Using backdoor routes causes eBGP routes to have an AD of 200. <ul> <li>Allows the shorter-path IGP routes to be added to the routing table.</li> </ul> </li> </ul> <blockquote> <div class="highlight"><pre tabindex="0" class="chroma"><code data-lang="fallback"><span class="line"><span class="cl">router bgp 123 </span></span><span class="line"><span class="cl"> network 1.1.1.0 backdoor</span></span></code></pre></div></blockquote> <p>-&mdash;-</p>