我想在 Linux Strongswan 客户端和思科路由器之间建立持久连接，这意味着 IPsec 隧道将永远存在？
有可能吗？在我当前的配置中，隧道在达到 ikelifetime 后将关闭，然后我需要手动将其启动。
这是我的 strongswan 配置：
config setup
uniqueids=never
conn %default
keyexchange=ikev1
type=tunnel
left=%any
auto=add
dpdaction=clear
margintime=0s
rekeyfuzz=20%
conn cisco-ezvpn
right=10.0.1.1
left=10.0.1.2
leftid=19
leftsourceip=%config
right=10.0.1.1
rightsubnet=0.0.0.0/0
xauth_identity=test
leftauth2=xauth
xauth=client
aggressive=yes
leftauth=psk
rightauth=psk
ikelifetime=300s
lifetime=300s
ike=aes256-sha256-ecp256
esp=aes256-sha256
以下是我的IOS配置（ipsec部分）：
crypto isakmp policy 1
encr aes 256
hash sha256
authentication pre-share
group 19
lifetime 300
!
crypto isakmp key test address 10.0.1.2
crypto isakmp keepalive 10
!
crypto isakmp client configuration group RA
key test
domain test.com
pool POOL
acl split
save-password
netmask 255.255.255.0
!
crypto isakmp client configuration group 19
key test123
domain test.com
pool POOL
acl split
save-password
netmask 255.255.255.0
crypto isakmp profile test
match identity group RA
match identity group 19
client authentication list AUTH
isakmp authorization list NET
client configuration address respond
client configuration group 19
virtual-template 1
!
!
crypto ipsec transform-set test esp-aes 256 esp-sha256-hmac
mode tunnel
!
crypto ipsec profile ipsecprof
set security-association lifetime kilobytes disable
set transform-set test
!
!
crypto map cmap 10 ipsec-isakmp
set peer 10.0.1.2
set transform-set test
match address split
!
!
interface Virtual-Template1 type tunnel
ip unnumbered Vlan10
ip nat inside
ip virtual-reassembly in
tunnel source Vlan10
tunnel mode ipsec ipv4
tunnel protection ipsec profile ipsecprof
!
interface Vlan10
ip address 10.0.1.1 255.255.255.248
ip helper-address 10.0.1.1
ip nat inside
ip virtual-reassembly in