cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements
280
Views
5
Helpful
2
Replies
Contributor

MSDP session source IP and RP

Hi everyone.

 

Please consider the following example:

 

(LO:1.1.1.1 )R1-12.12.12.1---12.12.12.2 R2 (LO:2.2.2.2)

 

Above we are setting MSDP session between R1 and R2. This is what I see:

Case 1:

R1 has a loopback0 : 1.1.1.1/32

ip pim rp-address 1.1.1.1

ip msdp peer 2.2.2.2

I see :

 R1 will not initiate TCP session for MSDP

 

Case2:

R1 has a loopback0 : 1.1.1.1/32

ip pim rp-address 1.1.1.1

ip msdp peer 2.2.2.2 connect-source loopback 0

I see:

R1  initiates TCP session for MSDP.

 

That tells me MSDP session SRC IP must be same as  RP's address on R1

####################

 

is it normal behavior or am I seeing GNS3 bug?

 

Additional info:

RFC 3618 does not say anything about SOURCE IP of MSDP session should be same as RP's IP address on the originating peer.

 

R1#show version
Cisco IOS Software, 7200 Software (C7200-ADVENTERPRISEK9-M), Version 15.2(4)S3, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport

 

 

Thanks and have a nice weekend!!

 

 

 

 

 

 

 

 

 

 

 

 

1 ACCEPTED SOLUTION

Accepted Solutions
Highlighted
VIP Expert

Re: MSDP session source IP and RP

Hi Sarah,

Long time no see here.

As long as the source is a loopback address but I don't think the source has to be the RP's IP address.

R1 has a loopback0 : 1.1.1.1/32

ip pim rp-address 1.1.1.1

ip msdp peer 2.2.2.2 connect-source loopback 1 (3.3.3.3)

interface loopback1

ip address 3.3.3.3

HTH

 

2 REPLIES 2
Highlighted
VIP Expert

Re: MSDP session source IP and RP

Hi Sarah,

Long time no see here.

As long as the source is a loopback address but I don't think the source has to be the RP's IP address.

R1 has a loopback0 : 1.1.1.1/32

ip pim rp-address 1.1.1.1

ip msdp peer 2.2.2.2 connect-source loopback 1 (3.3.3.3)

interface loopback1

ip address 3.3.3.3

HTH

 

Contributor

Re: MSDP session source IP and RP

Thanks Reza, nice to hear from you old friend:)
CreatePlease to create content
Content for Community-Ad
July's Community Spotlight Awards