OK. I am trying to set up a hub/spoke DMVPN to use the Loopback 0 as the tunnel sourec on the spokes. Right now I have about 150 spokes all using the F0/0 interface, but since that CAN be duplicated (by a home office such as a linksys giving out 192.168.1.x addresses) I want to change that to the Lo0 address. We have a scheme how that each spoke gets a 172.28.x.0/24. the Lo0 scheme will be 10.172.28.x/32, so each spoke will have a unique Lo0 controlled by us. The problem is that it won't come up with Lo0 as the source. I believe I have all of the relevant config below, and can add anything that is missing. The problem I am getting is that the tunnel gets stuck in NHRP - the tunnel interface is up/up, but eigrp doesn't come up and the tunnel will not pass traffic.
TIA
Russell
interface Tunnel2
ip address 172.26.3.10 255.255.0.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip mtu 1400
ip pim sparse-mode
ip nhrp authentication HMDMVPN1
ip nhrp map 172.26.0.1 x.x.x.x
ip nhrp map multicast x.x.x.x
ip nhrp network-id 100000
ip nhrp holdtime 360
ip nhrp nhs 172.26.0.1
ip tcp adjust-mss 1360
ip summary-address eigrp 100 172.28.10.0 255.255.255.0 5
load-interval 30
delay 1000
qos pre-classify
tunnel source FastEthernet0/0
tunnel destination x.x.x.x
tunnel key 100000
tunnel protection ipsec profile HM-DMVPN1
end
DMVPNTest#sh run int f0/0
Building configuration...
Current configuration : 264 bytes
!
interface FastEthernet0/0
ip address dhcp
ip access-group 101 in
no ip redirects
no ip unreachables
no ip proxy-arp
ip pim sparse-mode
ip nat outside
ip virtual-reassembly in
load-interval 30
duplex auto
speed auto
no cdp enable
no mop enabled
end
DMVPNTest#sh run int lo0
Building configuration...
Current configuration : 133 bytes
!
interface Loopback0
ip address 10.172.28.10 255.255.255.255
ip nat inside
ip virtual-reassembly in
ip tcp adjust-mss 1412
end
DMVPNTest#sh dmvpn
Legend: Attrb --> S - Static, D - Dynamic, I - Incomplete
N - NATed, L - Local, X - No Socket
# Ent --> Number of NHRP entries with same NBMA peer
NHS Status: E --> Expecting Replies, R --> Responding, W --> Waiting
UpDn Time --> Up or Down Time for a Tunnel
==========================================================================
Interface: Tunnel2, IPv4 NHRP Details
Type:Spoke, NHRP Peers:1,
# Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb
----- --------------- --------------- ----- -------- -----
1 x.x.x.x 172.26.0.1 UP 00:06:26 S
DMVPNTest#conf t
Enter configuration commands, one per line. End with CNTL/Z.
DMVPNTest(config)#int tu2
DMVPNTest(config-if)#shut
DMVPNTest(config-if)#tunn sou lo0
DMVPNTest(config-if)#no shut
DMVPNTest(config-if)#end
DMVPNTest#sh dmvpn
Legend: Attrb --> S - Static, D - Dynamic, I - Incomplete
N - NATed, L - Local, X - No Socket
# Ent --> Number of NHRP entries with same NBMA peer
NHS Status: E --> Expecting Replies, R --> Responding, W --> Waiting
UpDn Time --> Up or Down Time for a Tunnel
==========================================================================
Interface: Tunnel2, IPv4 NHRP Details
Type:Spoke, NHRP Peers:1,
# Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb
----- --------------- --------------- ----- -------- -----
1 x.x.x.x 172.26.0.1 NHRP 00:00:13 S
DMVPNTest#sh dmvpn
Legend: Attrb --> S - Static, D - Dynamic, I - Incomplete
N - NATed, L - Local, X - No Socket
# Ent --> Number of NHRP entries with same NBMA peer
NHS Status: E --> Expecting Replies, R --> Responding, W --> Waiting
UpDn Time --> Up or Down Time for a Tunnel
==========================================================================
Interface: Tunnel2, IPv4 NHRP Details
Type:Spoke, NHRP Peers:1,
# Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb
----- --------------- --------------- ----- -------- -----
1 x.x.x.x 172.26.0.1 NHRP 02:07:41 S
DMVPNTest#sh ip nhrp nhs det
Legend: E=Expecting replies, R=Responding, W=Waiting
Tunnel2:
172.26.0.1 E priority = 0 cluster = 0 req-sent 532 req-failed 0 repl-recv 0 (02:10:01 ago)
DMVPNTest#sh ip int br | i Tunnel2
Tunnel2 172.26.3.10 YES NVRAM up up
DMVPNTest#sh run | sec eigrp
ip summary-address eigrp 100 172.28.10.0 255.255.255.0 5
ip summary-address eigrp 100 172.28.10.0 255.255.255.0 5
ip summary-address eigrp 100 172.28.10.0 255.255.255.0 5
router eigrp 100
network 172.24.0.0 0.7.255.255
eigrp stub connected
