Network Command in address-family ipv4 multicast ??
Can Someone tell me the difference using the network command under bgp unicast routing process and under the address-family ipv4 multicast process in BGP ??? Please Help with some references cause i'm getting confused between the two.
Re: Network Command in address-family ipv4 multicast ??
in BGP multiprotocol there are several address families that accomplish different tasks.
address-family ipv4 unicast:
here the network command is used to advertise a unicast prefix that can become the destination of unicast IPv4 packets.
address-family ipv4 multicast:
this address family is used to advertise possible sources of multicast traffic in an inter-AS multicast scenario. That is the nework command here is not meant to advertise possible destination of unicast traffic but to allow the device that receives the advertisement to elect the link as the link where multicast traffic with a source in the advertised prefix can be accepted (RPF check).
the address-family ipv4 multicast in BGP can be the companion of MSDP in an inter-AS multicast scenario and provides the capability to pass the RPF check.
One could ask why a separate command, the reason is to provide the capability to differentiate border links: the classic example is when two ASes are connected by two links and one link is dedicated to unicast traffic and one link has to be used for multicast traffic only.
To achieve this two eBGP sessions are formed with one activated and configured for AF ipv4 unicast on link1 and the other one activated and configured in AF ipv4 multi for multicast on link2
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.