F1060配置拨号上网后，网速变的越来越慢

防火墙接了三根外线，一根是无线两根是拨号，单独一根无线上网没有任何问题，但是单独任意一根拨号上网，网速开始时正常，后来渐渐的变的越来越慢，是配置拨号时要注意什么吗？

policy-based-route dianxinbohao108-111 permit node 10

 if-match acl 3000

 apply output-interface Dialer1

#

policy-based-route dianxinbohao108-111 permit node 20

 if-match acl 3001

 apply output-interface GigabitEthernet1/0/2

 apply output-interface Dialer2

#

policy-based-route dianxinbohao108-111 permit node 30

 if-match acl 3003

 apply output-interface GigabitEthernet1/0/3

#

interface Dialer1

 ppp chap password cipher $c$3$C+QDS/Fwb4fme0JuDik+ZiRFTVgr85bRIvDF 

 ppp chap user 123456

 ppp pap local-user ad79626374 password cipher $c$3$v9sqG459FhB4juZHVoHah9Y6A9TKbh8wfcOC 

 dialer bundle enable

 dialer-group 1

 dialer timer idle 0

 ip address ppp-negotiate

 nat outbound 2000

#

interface Dialer2

 ppp chap password cipher $c$3$ktB/vjGPNEH9o16ZETT8NZ69GB8dq1trWTV6 

 ppp chap user 654321 

 ppp pap local-user ad79626774 password cipher $c$3$zIACxmvAQJGawbHKFWWpr2v/CtHCqWSPqCM= 

 dialer bundle enable

 dialer-group 2

 dialer timer idle 0

 ip address ppp-negotiate

 nat outbound 2000

#

interface GigabitEthernet1/0/1

 port link-mode route

 pppoe-client dial-bundle-number 1

#

interface GigabitEthernet1/0/2

 port link-mode route

 pppoe-client dial-bundle-number 2

#

interface GigabitEthernet1/0/3

 port link-mode route

 ip address 222.72.41.106 255.255.255.252

 nat outbound 2000

#

interface GigabitEthernet1/0/15

 port link-mode route

 ip address 10.0.0.65 255.255.255.248

 ip policy-based-route dianxinbohao108-111

#

object-policy ip Any-Any

 rule 0 pass

#

object-policy ip Untrust-Local

 rule 0 pass

#

object-policy ip av

 rule 0 inspect av

#

object-policy ip ips

 rule 0 inspect ips

#

security-zone name Local

#

security-zone name Trust

 import interface GigabitEthernet1/0/14

 import interface GigabitEthernet1/0/15

#

security-zone name DMZ

#

security-zone name Untrust

 import interface Dialer1

 import interface GigabitEthernet1/0/1

 import interface GigabitEthernet1/0/2

 import interface GigabitEthernet1/0/3

 import interface GigabitEthernet1/0/4

 import interface GigabitEthernet1/0/5

#

security-zone name Management

 import interface GigabitEthernet1/0/0

#

zone-pair security source Any destination Any

 object-policy apply ip Any-Any

#

zone-pair security source Untrust destination Local

 object-policy apply ip Untrust-Local

#

 scheduler logfile size 16

#

line class aux

 user-role network-operator

#

line class console

 authentication-mode scheme

 user-role network-admin

#

line class vty 

 user-role network-operator

#

line aux 0

 user-role network-admin

#

line con 0

 user-role network-admin

#

line vty 0 63

 authentication-mode scheme

 user-role network-admin

#

 ip route-static 0.0.0.0 0 Dialer1

 ip route-static 0.0.0.0 0 Dialer2

 ip route-static 0.0.0.0 0 222.72.41.105

 ip route-static 10.0.1.0 24 10.0.0.66

 ip route-static 10.0.2.0 24 10.0.0.66

 ip route-static 10.0.3.0 24 10.0.0.66

 ip route-static 10.0.4.0 24 10.0.0.66

 ip route-static 10.0.5.0 24 10.0.0.66

 ip route-static 10.0.6.0 24 10.0.0.66

 ip route-static 10.0.7.0 24 10.0.0.66

 ip route-static 10.0.8.0 24 10.0.0.66

 ip route-static 10.0.9.0 24 10.0.0.66

 ip route-static 10.0.10.0 24 10.0.0.66

 ip route-static 10.0.11.0 24 10.0.0.66

 ip route-static 10.0.12.0 24 10.0.0.66

 ip route-static 10.0.13.0 24 10.0.0.66

 ip route-static 10.0.14.0 24 10.0.0.66

 ip route-static 10.0.15.0 24 10.0.0.66

 ip route-static 10.0.16.0 24 10.0.0.66

 ip route-static 10.0.20.0 23 10.0.0.66

 ip route-static 10.0.32.0 22 10.0.0.66

#

 ssh server enable

#

acl basic 2000

 rule 0 permit

#

acl advanced 3000

 rule 0 permit ip source 10.0.8.0 0.0.0.255

 rule 5 permit ip source 10.0.9.0 0.0.0.255

 rule 10 permit ip source 10.0.10.0 0.0.0.255

 rule 15 permit ip source 10.0.11.0 0.0.0.255

#

acl advanced 3001

 rule 0 permit ip source 10.0.12.0 0.0.0.255

 rule 5 permit ip source 10.0.14.0 0.0.0.255

 rule 15 permit ip source 10.0.13.0 0.0.0.255

#

acl advanced 3002

 rule 0 permit ip source 10.0.1.0 0.0.0.255

 rule 5 permit ip source 10.0.2.0 0.0.0.255

 rule 10 permit ip source 10.0.3.0 0.0.0.255

 rule 15 permit ip source 10.0.4.0 0.0.0.255

 rule 20 permit ip source 10.0.5.0 0.0.0.255

 rule 25 permit ip source 10.0.6.0 0.0.0.255

 rule 30 permit ip source 10.0.7.0 0.0.0.255

 rule 35 permit ip source 10.0.8.0 0.0.0.255