Example: IPv4 Multicast with Interprovider VPNs Configuration
Figure 1: IPv4 Multicast with Interprovider VPNs Topology Diagram
Interprovider VPNs are also mentioned in RFC 4364. An example is shown in Figure 1. The topology is slightly different; the main difference is the addition of MSDP between the two provider core transit (P) routers. In this limited topology, each P router is an SP-RP for the local autonomous system (AS), and Router CE1 is the VPN C-RP. VPN-A is the name of the routing instance on routers PE0 and PE1.
Router CE0
[edit]protocols {pim {dense-groups {229.0.0.0/8;}rp {static {address 10.254.14.132;}}interface all {mode sparse-dense;version 2;}interface fxp0.0 {disable;}}}
Router PE0
[edit]protocols {pim {rp {static {address 10.254.71.49;}}interface all {mode sparse;version 2;}interface fxp0.0 {disable;}}}routing-instances {VPN-A {protocols {pim {dense-groups {229.0.0.0/8;} vpn-group-address 239.1.1.1; rp {static {address 10.254.14.132;}}interface t1-1/0/0:0.0 {mode sparse-dense;version 2;}interface lo0.1 {mode sparse-dense;version 2;}}}}}
Router P0
[edit]protocols {... msdp {
peer 10.254.71.48 {local-address 10.254.71.49;}}...pim {rp {local {address 10.254.71.49;}}interface all {mode sparse;version 2;}interface fxp0.0 {disable;}}}
Router P1
[edit]protocols {... msdp {
peer 10.254.71.49 {local-address 10.254.71.48;}}...pim {rp {local {address 10.254.71.48;}}interface all {mode sparse;version 2;}interface fxp0.0 {disable;}}}
Router PE1
[edit]protocols {pim {rp {static {address 10.254.71.48;}}interface all {mode sparse;version 2;}interface fxp0.0 {disable;}}}routing-instances {VPN-A {protocols {pim {dense-groups {229.0.0.0/8;} vpn-group-address 239.1.1.1; rp {static {address 10.254.14.132;}}interface t1-1/0/0:0.0 {mode sparse-dense;version 2;}interface lo0.1 {mode sparse-dense;version 2;}}}}}
Router CE1
[edit]protocols {pim {dense-groups {229.0.0.0/8;}rp {local {address 10.254.14.132;}}interface all {mode sparse-dense;version 2;}interface fxp0.0 {disable;}}}
Verifying Your Work
The show commands used to verify proper functionality of multicast in an interprovider environment are the same ones used with the first Layer 3 VPN multicast example (see Example: Basic IPv4 Multicast over a Layer 3 VPN Configuration).
The following output provides details for RP and the PIM join information:
- Router CE0 Status
- Router PE0 Status
- Router P0 Status
- Router P1 Status
- Router PE1 Status
- Router CE1 Status
Router CE0 Status
user@CE0> show pim rps extensive Instance: PIM.master
Family: INET
RP: 10.254.14.132
Learned via: static configuration
Time Active: 00:21:35
Holdtime: 0
Device Index: 119
Subunit: 32769
Interface: pe-6/0/0.32769
Group Ranges:
224.0.0.0/4
Active groups using RP:
Register State for RP:
Group Source FirstHop RP Address State Timeout
Family: INET6
user@CE0> show pim join extensive Instance: PIM.master Family: INET
Group: 229.1.1.1
Source: 192.168.295.38
Flags: dense
Upstream interface: fe-3/0/2.0
Downstream interfaces:
t1-7/0/0:0.0
Instance: PIM.master Family: INET6
Router PE0 Status
user@PE0> show pim rps extensive Instance: PIM.master
Family: INET
RP: 10.254.71.49
Learned via: static configuration
Time Active: 00:22:07
Holdtime: 0
Device Index: 34
Subunit: 32769
Interface: pe-1/1/0.32769
Group Ranges:
224.0.0.0/4
Active groups using RP:
239.1.1.1
total 1 groups active
Register State for RP:
Group Source FirstHop RP Address State Timeout
239.1.1.1 10.254.71.51 10.254.71.51 10.254.71.49 Suppress 20
Family: INET6
user@PE0> show pim rps extensive instance VPN-A Instance: PIM.VPN-A
Family: INET
RP: 10.254.14.132
Learned via: static configuration
Time Active: 00:22:22
Holdtime: 0
Device Index: 34
Subunit: 32771
Interface: pe-1/1/0.32771
Group Ranges:
224.0.0.0/4
Active groups using RP:
Register State for RP:
Group Source FirstHop RP Address State Timeout
Family: INET6
user@PE0> show pim join extensive Instance: PIM.master Family: INET
Group: 239.1.1.1
Source: *
RP: 10.254.71.49
Flags: sparse,rptree,wildcard
Upstream interface: so-0/0/0.0
Upstream State: Join to RP
Downstream Neighbors:
Interface: mt-1/1/0.32769
0.0.0.0 State: Join Flags: SRW Timeout: Infinity
Group: 239.1.1.1
Source: 10.254.71.47
Flags: sparse,spt-pending
Upstream interface: so-0/0/0.0
Upstream State: Join to Source
Keepalive timeout: 198
Downstream Neighbors:
Interface: mt-1/1/0.32769
0.0.0.0 State: Join Flags: S Timeout: Infinity
Group: 239.1.1.1
Source: 10.254.71.51
Flags: sparse
Upstream interface: local
Upstream State: Local Source, Prune to RP
Keepalive timeout: 198
Downstream Neighbors:
Interface: so-0/0/0.0
192.168.296.42 State: Join Flags: S Timeout: 176
Instance: PIM.master Family: INET6
user@PE0> show pim join extensive instance
VPN-A Instance: PIM.VPN-A Family: INET
Group: 229.1.1.1
Source: 192.168.295.38
Flags: dense
Upstream interface: t1-1/0/0:0.0
Downstream interfaces:
mt-1/1/0.32769
Instance: PIM.VPN-A Family: INET6
Router P0 Status
user@P0> show pim rps extensive Instance: PIM.master
Family: INET
RP: 10.254.71.49
Learned via: static configuration
Time Active: 00:30:43
Holdtime: 0
Device Index: 33
Subunit: 32768
Interface: pd-1/1/0.32768
Group Ranges:
224.0.0.0/4
Active groups using RP:
239.1.1.1
total 1 groups active
Register State for RP:
Group Source FirstHop RP Address State Timeout
239.1.1.1 10.254.71.51 10.254.71.51 10.254.71.49 Receive
Family: INET6
user@P0> show pim join extensive Instance: PIM.master Family: INET
Group: 239.1.1.1
Source: *
RP: 10.254.71.49
Flags: sparse,rptree,wildcard
Upstream interface: local
Upstream State: Local RP
Downstream Neighbors:
Interface: so-0/1/0.0
192.168.296.41 State: Join Flags: SRW Timeout: 184
Group: 239.1.1.1
Source: 10.254.71.47
Flags: sparse,spt-pending
Upstream interface: so-0/0/2.0
Upstream State: Local RP, Join to Source
Keepalive timeout: 207
Downstream Neighbors:
Interface: so-0/1/0.0
192.168.296.41 State: Join Flags: S Timeout: 184
Group: 239.1.1.1
Source: 10.254.71.51
Flags: sparse,spt
Upstream interface: so-0/1/0.0
Upstream State: Local RP, Join to Source
Keepalive timeout: 207
Downstream Neighbors:
Interface: so-0/0/2.0
192.168.296.73 State: Join Flags: S Timeout: 186
Interface: so-0/1/0.0 (pruned)
192.168.296.41 State: Prune Flags: SR Timeout: 184
Instance: PIM.master Family: INET6
Router P1 Status
user@P1> show pim rps extensive Instance: PIM.master
Family: INET
RP: 10.254.71.48
Learned via: static configuration
Time Active: 06:26:56
Holdtime: 0
Device Index: 32
Subunit: 32768
Interface: pd-1/1/0.32768
Group Ranges:
224.0.0.0/4
Active groups using RP:
239.1.1.1
total 1 groups active
Register State for RP:
Group Source FirstHop RP Address State Timeout
239.1.1.1 10.254.71.47 10.254.71.47 10.254.71.48 Receive 0
Family: INET6
user@P1> show pim join extensive Instance: PIM.master Family: INET
Group: 239.1.1.1
Source: *
RP: 10.254.71.48
Flags: sparse,rptree,wildcard
Upstream interface: local
Upstream State: Local RP
Downstream Neighbors:
Interface: so-0/0/1.0
192.168.296.50 State: Join Flags: SRW Timeout: 174
Group: 239.1.1.1
Source: 10.254.71.47
Flags: sparse,spt
Upstream interface: so-0/0/1.0
Upstream State: Local RP, Join to Source
Keepalive timeout: 196
Downstream Neighbors:
Interface: so-0/0/1.0 (pruned)
192.168.296.50 State: Prune Flags: SR Timeout: 174
Interface: so-0/0/2.0
192.168.296.74 State: Join Flags: S Timeout: 178
Group: 239.1.1.1
Source: 10.254.71.51
Flags: sparse,spt-pending
Upstream interface: so-0/0/2.0
Upstream State: Local RP, Join to Source
Keepalive timeout: 196
Downstream Neighbors:
Interface: so-0/0/1.0
192.168.296.50 State: Join Flags: S Timeout: 174
Instance: PIM.master Family: INET6
Router PE1 Status
user@PE1> show pim rps extensive Instance: PIM.master
Family: INET
RP: 10.254.71.48
Learned via: static configuration
Time Active: 00:25:13
Holdtime: 0
Device Index: 34
Subunit: 32770
Interface: pe-1/1/0.32770
Group Ranges:
224.0.0.0/4
Active groups using RP:
239.1.1.1
total 1 groups active
Register State for RP:
Group Source FirstHop RP Address State Timeout
239.1.1.1 10.254.71.47 10.254.71.47 10.254.71.48 Suppress 42
Family: INET6
user@PE1> show pim rps extensive instance VPN-A Instance: PIM.VPN-A
Family: INET
RP: 10.254.14.132
Learned via: static configuration
Time Active: 00:25:17
Holdtime: 0
Device Index: 34
Subunit: 32771
Interface: pe-1/1/0.32771
Group Ranges:
224.0.0.0/4
Active groups using RP:
Register State for RP:
Group Source FirstHop RP Address State Timeout
Family: INET6
user@PE1> show pim join extensive Instance: PIM.master Family: INET
Group: 239.1.1.1
Source: *
RP: 10.254.71.48
Flags: sparse,rptree,wildcard
Upstream interface: so-0/0/3.0
Upstream State: Join to RP
Downstream Neighbors:
Interface: mt-1/1/0.32769
0.0.0.0 State: Join Flags: SRW Timeout: Infinity
Group: 239.1.1.1
Source: 10.254.71.47
Flags: sparse
Upstream interface: local
Upstream State: Local Source, Prune to RP
Keepalive timeout: 173
Downstream Neighbors:
Interface: so-0/0/3.0
192.168.296.49 State: Join Flags: S Timeout: 199
Group: 239.1.1.1
Source: 10.254.71.51
Flags: sparse,spt-pending
Upstream interface: so-0/0/3.0
Upstream State: Join to Source
Keepalive timeout: 173
Downstream Neighbors:
Interface: mt-1/1/0.32769
0.0.0.0 State: Join Flags: S Timeout: Infinity
Instance: PIM.master Family: INET6
user@PE1> show pim join extensive instance
VPN-A Instance: PIM.VPN-A Family: INET
Group: 229.1.1.1
Source: 192.168.295.38
Flags: dense
Upstream interface: mt-1/1/0.32769
Downstream interfaces:
t1-1/0/0:0.0
Instance: PIM.VPN-A Family: INET6
Router CE1 Status
user@CE1> show pim rps extensive Instance: PIM.master
Family: INET
RP: 10.254.14.132
Learned via: static configuration
Time Active: 00:28:22
Holdtime: 0
Device Index: 69
Subunit: 32768
Interface: pd-3/1/0.32768
Group Ranges:
224.0.0.0/4
Active groups using RP:
Register State for RP:
Group Source FirstHop RP Address State Timeout
Family: INET6
user@CE1> show pim join extensive Instance: PIM.master Family: INET
Group: 229.1.1.1
Source: 192.168.295.38
Flags: dense
Upstream interface: t1-2/0/0:0.0
Downstream interfaces:
fe-2/2/0.0
Instance: PIM.master Family: INET6
