i understand why you might use black hole routing for privately addressed internets as a more efficient way of filtering inbound IP SA to guard against spoofing internal addressing, BUT, i don't understand why EIGRP installs them automatically and OSPF manually for summary routes on ABR's.
i don't see what the significance of them is, apart from not sending ICMP unreachables for broken routes...i'm missing something here because i just don't get it!
The idea behind having a route to the null interface (I think this is what you are referring to) is that an OSPF ABR or an EIGRP router performing summarization will not send packets destined for an unused address in the range via the default route. If it did, this would cause a routing loop, between the summarizing router and the router advertising a default.
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
the server (XR) KEXDH_REPLY. After debug ssh serv...
Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...