If I make changes to network statements, ie what networks my BGP router in HQ advertises out, would this cause an outage or make the BGP neighbours go down ? surely its ok add new networks without impacting the system?
also when adding a network statement into BGP does the IGP or static route have to match exactly the network statement ?
a) changes to network statements will not make the BGP neighbours to go down.
You could cause an outage if you would remove some network statement incorrectly and your remote sites would lose connectivity to your HQ subnet.
b) when adding a network statement into BGP there has to be an exact match (the same prefix/mask) in the routing table to get the prefix into BGP table (and advertised to the BGP neighbours).
So you need to configure a static route with an exact match or to receive a route with an exact match via IGP. The last possibility is a directly connected subnet (or loopback subnet) exactly matching.
BGP Synchroniztion Off: You can advertise a network in BGP as long as you have a route in your routing table that matches the network/prefix. You do not need to worry if your IGP has a route for this or not.
BGP Synchronization On: You can advertise a network in BGP, as long as yo uhave a route in your routing table that matched the network/prefix, and this route is included in your IGP.
if the prefix is not installed in the BGP table it won't advertise it anyway and to install a prefix in the BGP table with a network command with auto-summary disabled then you have to have an exact match( prefix and prefix-length) between the network command and the prefix already installed in the RIB.
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 ...