Troubleshooting Md-Vpn; A Default-Mdt Cannot Be Established - HP MSR2003 Configuration Manual

[CEb2] pim
[CEb2-pim] c-bsr 3.3.3.3
[CEb2-pim] c-rp 3.3.3.3
[CEb2-pim] quit
# Configure OSPF.
[CEb2] ospf 1
[CEb2-ospf-1] area 0.0.0.0
[CEb2-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0
[CEb2-ospf-1-area-0.0.0.0] network 10.11.0.0 0.0.255.255
[CEb2-ospf-1-area-0.0.0.0] quit
[CEb2-ospf-1] quit
Verifying the configuration
# Display information about the default-groups in VPN instances on PE 1.
[PE1] display multicast-domain default-group
Group address
239.1.1.1
239.4.4.4
# Display information about the default-groups in VPN instances on PE 4.
[PE4] display multicast-domain default-group
Group address
239.1.1.1
239.4.4.4

Troubleshooting MD-VPN

This section describes common MD-VPN problems and how to troubleshoot them.

A default-MDT cannot be established

Symptom
The default-MDT cannot be established. PIM neighboring relationship cannot be established between PE
devices' interfaces that are in the same VPN instance.
Analysis
The construction of the default-MDT requires effective MTI interfaces. The MTI interfaces take effect
•
only after the default-group is specified and the MD source interface gets the public IP address.
On different PE devices, the same default-group must be configured for the same VPN instance. A
•
default-group address uniquely identifies a default-MDT. If different default-group addresses have
been configured for a VPN instance on different PE devices, a default-MDT cannot be established
for that VPN instance on different PE devices.
The same PIM mode must run on all the interfaces of the same VPN instance on different PE devices
•
and on all the interfaces of the P router. This allows the default-MDT to be correctly built for the VPN
instance. It also allows a PIM neighboring relationship to be established between the VPN instance
on the local PE device and the same VPN instance on the remote PE device.
BGP and unicast route configurations are prerequisites for PIM to obtain correct routing information.
•
PIM can only be enabled on the MTI interface if at least one interface of the VPN instance is
Source address Interface
1.1.1.1 MTunnel0
1.1.1.1 MTunnel1
Source address Interface
1.1.1.4 MTunnel0
1.1.1.4 MTunnel1
VPN instance
a
b
VPN instance
a
b
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