Refer to the exhibit.
Two ISPs have decided to use MSDP and configured routers X and Y (both are PIM RPs) as
MSDP peers. In the domain of ISP B, PC A has sent an IGMP membership report for the group
224.1.1.1 and PC B has sent an IGMP membership report for the group 224.5.5.5. Assuming that
the MSDP peering relationship between routers X and Y is functional, and given the partial
configuration output shown from router X, which two of these statements are true? Choose two.)
A.
Router X will contain an entry for 224.1.1.1 in its SA cache and will also have an installed (S, G)
entry for this in its mroute table.
B.
Router X will not contain an entry for 224.1.1.1 in its SA cache but will have an installed (*, G)
entry for this in its mroute table.
C.
Router X will not contain an entry for 224.5.5.5 in its SA cache but will have an installed (S, G)
entry for this in its mroute table.
D.
Router X will not contain an entry for 224.5.5.5 in its SA cache but will have an installed (*, G)
entry for this in its mroute table.
E.
Router X will have no entries for 224.5.5.5 in neither its SA cache nor in its mroute table. ^F.
Router F. X will have no entries for 224.1.1.1 in neither its SA cache nor in its mroute table.
Explanation:
Configuring an MSDP Peer
You enable MSDP by configuring an MSDP peer to the local router.
Note
The router you specify by Domain Naming System (DNS) name or IP address as an MSDP peer is
probably a Border Gateway Protocol (BGP) neighbor. If it is not, see the section “Configuring a
Default MSDP Peer” later in this document.To configure an MSDP peer, use the following commands in global configuration mode as needed.
The second command is optional.Filtering SA Request Messages
By default, only routers that are caching SA information can respond to SA request messages. By
default, such a router honors all SA request messages from its MSDP peers. That is, it will supply
the IP addresses of the sources that are active.
However, you can configure the router to ignore all SA request messages from an MSDP peer. Or,
you can honor only those SA request messages from a peer for groups described by a standard
access list. If the access list passes, SA request messages will be accepted. All other such
messages from the peer for other groups will be ignored.
To configure one of these options, use either of the following commands in global configuration
mode:http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfmsdp_ps1835_TSD_Product
s_Configuration_Guide_Chapter.html#wp1001055
