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Core Router Goes Down Weekly

By mcintoshs ·
About three weeks ago we enabled pim-dm on our HP 5308xl core switches to facilitate VBrick video streaming on our network. All VLANs already had IGMP enabled, we simply added the global 'router pim' setting and the 'ip pim' setting on all VLAN's. Since then we have had two instances where our core Cisco 3660 router will no longer forward packets and will not respond to a ping. Also, it will not accept console connections from my laptop to extract statistics prior to power recycling the router. These two instances have both occurred weekly on the same day late at night when our full backups are running. This router is a hub router for nine PTP T1 connections and is also the default gateway. Power recycling the router fixes the problem--until the next week at the same time. Is it possible our router needs to have some corresponding pim-dm configuration change made? Our current plan is to remove the pim-dm config on our HP core switches prior to the time it has occurred the past two weeks to observe the behavior. Any guidance would be greatly appreciated as we don't have Cisco support on our routers. Here is the sh ip interface output from the fe and a representative serial interface from the core router. Any other info gladly provided on request:
HS#sh ip int
FastEthernet0/0 is up, line protocol is up
Internet address is 10.0.0.1/16
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Multicast reserved groups joined: 224.0.0.10
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same interface is disabled
IP Flow switching is disabled
IP Fast switching turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Probe proxy name replies are disabled
Policy routing is disabled
Network address translation is disabled
WCCP Redirect outbound is disabled
WCCP Redirect exclude is disabled
BGP Policy Mapping is disabled
FastEthernet0/1 is administratively down, line protocol is down
Internet protocol processing disabled
Serial1/0 is up, line protocol is up
Internet address is 192.168.0.2/30
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Multicast reserved groups joined: 224.0.0.10
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same interface is enabled
IP Flow switching is disabled
IP Fast switching turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Probe proxy name replies are disabled
Policy routing is disabled
Network address translation is disabled
WCCP Redirect outbound is disabled
WCCP Redirect exclude is disabled
BGP Policy Mapping is disabled

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