MSR路由器有定时释放NAT连接的功能吗

nat会话 有老化时间的，如果不足了 建议更换设备

可以参考一下nat老化时间：

V5路由器查看nat会话默认的老化时长如下：

nat aging-time命令用来设置地址转换表项的有效时间。undo nat aging-time用来将指定协议类型的地址转换表项的有效时间恢复为缺省情况。

缺省情况下，各协议的地址转换表项的有效时间如下：

1)DNS协议地址转换表项的有效时间为10秒；

2)FTP协议控制链路（ftp-ctrl）地址转换表项的有效时间为300秒；

3)FTP协议数据链路（ftp-data）地址转换表项的有效时间为300秒；

4)ICMP地址转换表项的有效时间为10秒；

5)NO-PAT转换方式下的私网地址和公网地址转换表项的有效时间为240秒；

6)PPTP协议地址转换表项的有效时间为300秒；

7)TCP地址转换表项的有效时间为300秒；

8)TCP协议fin、rst连接地址转换表项的有效时间为10秒；

9)协议syn连接地址转换表项的有效时间为10秒；

10)UDP地址转换表项的有效时间为240秒。

V7的设备nat aging-time命令已经取消，目前把nat会话转移到了session功能某块中，对应的协议和应用协议的默认的老化时长如下：

[H3C]display session aging-time state
State               Aging Time(s)
SYN                 30
TCP-EST             3600
FIN                 30
UDP-OPEN            30
UDP-READY           60
ICMP-REQUEST        60
ICMP-REPLY          30
RAWIP-OPEN          30
RAWIP-READY         60
UDPLITE-OPEN        30
UDPLITE-READY       60
DCCP-REQUEST        30
DCCP-EST            3600
DCCP-CLOSEREQ       30
SCTP-INIT           30
SCTP-EST            3600
SCTP-SHUTDOWN       30
ICMPV6-REQUEST      60
ICMPV6-REPLY        30
TCP-TIME-WAIT       2
TCP-CLOSE           2

[H3C]display session aging-time application
Application                                                    Aging time(s)
bootpc                                                         120
bootps                                                         120
dns                                                            1
ftp                                                            3600
ftp-data                                                       240
gprs-data                                                      60
gprs-sig                                                       60
gtp-control                                                    60
gtp-user                                                       60
h225                                                           3600
h245                                                           3600
https                                                          600
ils                                                            3600
l2tp                                                           120
mgcp-callagent                                                 60
mgcp-gateway                                                   60
netbios-dgm                                                    3600
netbios-ns                                                     3600
netbios-ssn                                                    3600
ntp                                                            120
pptp                                                           3600
qq                                                             120
ras                                                            300
rip                                                            120
rsh                                                            60
rtsp                                                           3600
sccp                                                           3600
sip                                                            300
snmp                                                           120
snmptrap                                                       120
sqlnet                                                         600
stun                                                           600
syslog                                                         120
tacacs-ds                                                      120
tftp                                                           60
who                                                            120
xdmcp                                                          3600
others:                                                        1200

1、最佳建议，更换新能更高的设备

2、可以手动尝试

配置地址转换有效时间

该配置用于设置各协议地址转换表项的有效时间。

表1-11 配置地址转换有效时间