MSDP the wrong idea of the line

First step MSDP peer the Establishment

1. respective show Run | S MSDP

Check Configuration and make adjustments

if there's an error in the back of Connect-source,

The original IP MSDP sa-filterout will disappear .

need to add

2. determine the two RP address

Guaranteed ground level up to

with Source Ping a bit .

3. determine the interface where the RP address is located

if the multi-interface RP addresses are consistent with configuration determination

4. Show IP MSDP peer ensures that neighbors are established properly

Step two: Building a shared tree

1. View this side whether the RP has been set up accordingly (*,G)

R2#shwoip Mroute

A, only (*224.0.1.40) But the back is attached stopped

Check to see if the server has have a RP- Related Settings and Query the local RP address on peer MSDP peers

and Check the next router

B, if both (*, group address) but with stopped

also indicates that this side has no relevant RP Settings

Strategy

--- individual group numbers for the PIM protocol Auto: 224.0.1.39224.0.1.40

BSR : 224.0.0.13

C, If the table key is successful check the next router

2 , follow the topology from RP to client finds next route for direction

R2#shwoip Mroute

repeat the last round But make sure the bottom-level gets to the RP

until the correct table entry is found

or find the client

3 , guarantee the source of DR has the correct table entry R6#showip PIM interface

Show IP Mroute

1 if not, check if the source is added to the group

2 Check that the appropriate interface is PIM-enabled

R6#showip PIM Interface

to determine the correct DR

Special Note If the client is a loopback for the router

or a switch. SVI you need plus IP PIM space-mode

4. finally determine whether the shared tree was successful on the RP

Step three The establishment of the source tree

1 , Ping Group address at source

A , on this side RP show IP Mroute

See if have ( S * G)

1.if not, check the source to the origin of the source to the RP address of the accessibility

Note Check Incoming interface

2 , check the source has no RP(dynamic plus mapping)

• Dynamic then view number of hops delegated by RP

• The most important thing to see is there is none. . Mroute didn't have a multicast .

B , in the peer-to-peer RP Show Ipmroute

See if have ( S * G)

• If you do not have then check both ends whether there is a sa-filter setting

• If you have check that the incoming interface is correct

1, check whether to establish a normal neighbor relationship with the peer (preferably intermediate router to check)

and check the interface configuration for adjustments Note You need to establish a neighbor under the interface of the RPF check

If two lines are not IPPIM configured , view the peer

R2#show IP RPF 10.1.1.13

Failed, no route exists

2, according to the order of the check of the MSDP at the edge of more than multicast

Note Whether its BGP multicast neighbor is established

if no mulicast is more unicast

C , finally determine if the peer has established the correct ( S, *g)

D , view on this side is the export correct ?

Check the intermediate router if it is not correct whether there is a multicast delimitation

Pay special attention to whether you have a route to the source because the back router is converted from a shared tree to a shortest tree

an RPF check is required

2 . Check the source tree of the route after the RP is set up in turn

until the client client does not need to establish a source tree but requires a route with a source

3 , from this side The RP starts checking the rear router in turn

Show IP Mroute

If it does not exist Check Neighbor

if an interface error is entered

Check the show IPRPF Source Address

interface to adjust the RPF checksum

4 , in the source ping Group address

if it does not pass

check whether there are policies in turn

generally this side There will be more policies before the RP

Special attention Multicast ( UDP) go to unicast (ICMP) back pay particular attention to the use of trance generally not applicable

MSDP the wrong idea of the line