Делаю по примеру конфигов из этого поста:
https://www.opennet.ru/openforum/vsluhforumID6/15508.htmlтуннель на spoke не поднимается, в дебаге вот это:
Jun 3 20:34:50 GDT: NHRP: Attempting to send packet via DEST 192.168.55.53
Jun 3 20:34:50 GDT: NHRP: Pak out FastEthernet0 would leave logical NBMA network
Jun 3 20:34:50 GDT: NHRP: Resetting retransmit due to hold-timer for 192.168.55.53
Jun 3 20:35:10 GDT: NHRP: Attempting to send packet via DEST 192.168.55.53
Jun 3 20:35:10 GDT: NHRP: Pak out FastEthernet0 would leave logical NBMA network
Jun 3 20:35:10 GDT: NHRP: Resetting retransmit due to hold-timer for 192.168.55.53
Jun 3 20:35:30 GDT: NHRP: Attempting to send packet via DEST 192.168.55.53
Jun 3 20:35:30 GDT: NHRP: Pak out FastEthernet0 would leave logical NBMA network
Jun 3 20:35:30 GDT: NHRP: Resetting retransmit due to hold-timer for 192.168.55.53
Jun 3 20:35:50 GDT: NHRP: Attempting to send packet via DEST 192.168.55.53
Jun 3 20:35:50 GDT: NHRP: Pak out FastEthernet0 would leave logical NBMA network
Jun 3 20:35:50 GDT: NHRP: Resetting retransmit due to hold-timer for 192.168.55.53
Jun 3 20:36:10 GDT: NHRP: Attempting to send packet via DEST 192.168.55.53
Jun 3 20:36:10 GDT: NHRP: Pak out FastEthernet0 would leave logical NBMA network
Jun 3 20:36:10 GDT: NHRP: Resetting retransmit due to hold-timer for
192.168.55.52/30 - сеть для туннеля, а 55.53 - это интерфейс тунеля на том конце
1750-My-cisco#sh ip nhrp
192.168.55.53/32 via 192.168.55.53, Tunnel1 created 00:11:01, never expire
Type: static, Flags: authoritative
NBMA address: XXX.XXX.XXX.XXX
XXX.XXX.XXX.XXX внешний интерфейс на том конце (HUB) с реальным IP
на HUB в дебаге и в sh ip nhrp вообще пусто
ещё одно уточнение: PAT поднят на Windows XP путем расшаривания 3G соединения