I am having issues getting HUB-to-HUB connectivity working. As practice, I’m using the Hampton, VA hub site and the Atlanta, GA hub site. (PLEASE DON'T CONFUSE this with Cisco dual-hub configurations)
I am able to get to work and EIGRP to route if I configure Atlanta as:
!
interface Tunnel1
description (Spoke Tunnel)
bandwidth 1500
ip address 10.250.210.1 255.255.255.0
no ip redirects
ip mtu 1472
ip nhrp authentication SPOKE
ip nhrp map multicast dynamic
ip nhrp network-id 10001
ip nhrp holdtime 700
ip nhrp max-send 65535 every 10
ip nhrp cache non-authoritative
ip tcp adjust-mss 1432
no ip split-horizon eigrp 250
load-interval 30
delay 1000
keepalive 10 7
tunnel source 172.17.3.1
tunnel mode gre multipoint
tunnel key 10001
hold-queue 4096 in
hold-queue 4096 out
!
!
interface Tunnel2
description (Global-Hub Tunnel)
bandwidth 1500
ip address 10.250.200.1 255.255.255.0
no ip redirects
ip mtu 1472
no ip next-hop-self eigrp 250 (is this needed?)
ip nhrp authentication GLOBAL
ip nhrp map multicast dynamic
ip nhrp network-id 10002
ip nhrp holdtime 700
ip nhrp max-send 65535 every 10
ip nhrp cache non-authoritative
ip tcp adjust-mss 1432
load-interval 30
delay 1000
keepalive 10 7
tunnel source 172.17.3.1
tunnel mode gre multipoint
tunnel key 10002
hold-queue 4096 in
hold-queue 4096 out
!
!
router eigrp 250
redistribute static
network 10.250.200.0 0.0.0.255
network 10.250.210.0 0.0.0.255
no auto-summary
!
router bgp 1150
no synchronization
bgp log-neighbor-changes
network 172.17.3.0 mask 255.255.255.252
neighbor 172.17.3.2 remote-as 12000
no auto-summary
…......... and Hampton, VA as:
!
interface Tunnel1
bandwidth 1024
ip address 10.250.250.1 255.255.255.0
no ip redirects
ip mtu 1472
ip nhrp authentication SPOKHAM
ip nhrp map multicast dynamic
ip nhrp network-id 50001
ip nhrp holdtime 700
ip nhrp max-send 65535 every 10
ip nhrp cache non-authoritative
ip tcp adjust-mss 1432
no ip split-horizon eigrp 250
load-interval 30
delay 1000
keepalive 10 7
tunnel source 172.17.3.25
tunnel mode gre multipoint
tunnel key 50001
hold-queue 4096 in
hold-queue 4096 out
!
!
interface Tunnel2
description (Global-Hub Tunnel)
bandwidth 1024
ip address 10.250.200.25 255.255.255.0
no ip redirects
ip mtu 1472
no ip next-hop-self eigrp 250
ip nhrp authentication GLOBAL
ip nhrp map multicast 172.17.3.1
ip nhrp map 10.250.200.1 172.17.3.1
ip nhrp network-id 10002
ip nhrp holdtime 700
ip nhrp nhs 10.250.200.1
ip tcp adjust-mss 1432
no ip split-horizon eigrp 250
delay 1000
qos pre-classify
keepalive 10 4
tunnel source 172.17.3.25
tunnel mode gre multipoint
tunnel key 10002
!
!
router eigrp 250
network 10.250.200.0 0.0.0.255
network 10.250.250.0 0.0.0.255
network 172.22.250.25 0.0.0.0
no auto-summary
!
router bgp 1750
no synchronization
bgp log-neighbor-changes
network 172.17.3.24 mask 255.255.255.252
neighbor 172.17.3.26 remote-as 12000
no auto-summary
!
….BUT that Hampton Tunnel2 is basically making Hampton a spoke of Atlanta. If I configure my other hub sites (Indiana and Washington) like the Hampton Tunnel above, they’ll be dependent on Atlanta being UP all the time in order to keep the 10.250.200.x DMVPN tunnel alive.
Now… When I change the Hampton’s Tunnel2 to look like:
!
!
interface Tunnel2
bandwidth 1024
ip address 10.250.200.25 255.255.255.0
no ip redirects
ip mtu 1472
no ip next-hop-self eigrp 250 (is this needed? It doesn’t work right even when removed)
ip nhrp authentication GLOBAL
ip nhrp map multicast dynamic
ip nhrp network-id 10002
ip nhrp holdtime 700
ip nhrp max-send 65535 every 10
ip nhrp cache non-authoritative
ip tcp adjust-mss 1432
no ip split-horizon eigrp 250
load-interval 30
delay 1000
qos pre-classify
keepalive 10 7
tunnel source 172.17.3.25
tunnel mode gre multipoint
tunnel key 10002
hold-queue 4096 in
hold-queue 4096 out
!
…I get no EIGRP routes between Hampton and Atlanta which basically is saying it not working (I assume).
Both Atlanta and Hampton have spokes that utilize their respective Tunnel 1 interfaces. The spokes are not meant to talk to other spokes BUT the HUBs can/should be fully meshed.
What am I doing wrong? Thanx!
