[求助]一个棘手的小问题...

分公司用cisco3662与总部cisco7609用串口相连,另有一台2610与3662通过快速以太网相连，几年前有几个分支机构通过isdn和2610相连，现增加一分支机构通过帧中继用串口和2610连接，该分支结构用的cisco1700路由器。3662配置ospf, 在2610配置好静态路由、在1700配置缺省路由后，1700网段的分支机构不能访问总部，请高手指点,应如何配置 具体配置如下 cisco 1700: interface FastEthernet0 ip address 10.28.150.161 255.255.255.224 speed auto ! interface Serial0 no ip address encapsulation frame-relay IETF frame-relay lmi-type ansi ! interface Serial0.1 point-to-point ip address 10.28.157.21 255.255.255.252 frame-relay interface-dlci 16 ! router odr passive-interface Serial0 ! ip classless ip route 0.0.0.0 0.0.0.0 10.28.157.22 ip route 10.28.136.0 255.255.255.0 10.28.157.22 no ip http server cisco 2610 interface Ethernet0/0 ip address 10.28.136.253 255.255.255.0 half-duplex ! interface Serial0/0 no ip address encapsulation frame-relay IETF frame-relay lmi-type ansi ! interface Serial0/0.1 point-to-point ip address 10.28.157.22 255.255.255.252 frame-relay interface-dlci 16 ! interface BRI1/0 no ip address encapsulation ppp dialer rotary-group 0 dialer-group 1 isdn switch-type basic-net3 no cdp enable ! interface BRI1/1 no ip address encapsulation ppp dialer rotary-group 1 dialer-group 1 isdn switch-type basic-net3 no cdp enable ! interface BRI1/2 no ip address encapsulation ppp dialer rotary-group 2 dialer-group 1 isdn switch-type basic-net3 no cdp enable ! interface BRI1/3 no ip address shutdown isdn switch-type basic-net3 ! interface Dialer0 ip unnumbered Ethernet0/0 encapsulation ppp dialer in-band dialer idle-timeout 600 dialer map ip 11.1.1.1 name ls803 dialer hold-queue 10 dialer load-threshold 100 either dialer-group 1 peer default ip address pool lcpool no cdp enable ppp authentication pap chap ppp multilink ! interface Dialer1 ip unnumbered Ethernet0/0 encapsulation ppp dialer in-band dialer idle-timeout 600 dialer map ip 12.1.1.1 name ck803 dialer hold-queue 10 dialer load-threshold 100 either dialer-group 1 peer default ip address pool lcpool no cdp enable ppp authentication pap chap ppp multilink ! interface Dialer2 ip unnumbered Ethernet0/0 encapsulation ppp dialer in-band dialer idle-timeout 600 dialer map ip 13.1.1.1 name lc803 dialer hold-queue 10 dialer load-threshold 100 either dialer-group 1 peer default ip address pool lcpool no cdp enable ppp authentication pap chap ppp multilink ! router odr ! ip local pool lcpool 10.28.136.247 10.28.136.250 ip classless ip route 0.0.0.0 0.0.0.0 10.28.136.254 ip route 10.28.150.160 255.255.255.224 10.28.157.21 ip route 11.0.0.0 255.0.0.0 11.1.1.1 ip route 11.1.1.1 255.255.255.255 Dialer0 ip route 12.0.0.0 255.0.0.0 12.1.1.1 ip route 12.1.1.1 255.255.255.255 Dialer1 ip route 13.0.0.0 255.0.0.0 13.1.1.1 ip route 13.1.1.1 255.255.255.255 Dialer2 ip http server ip pim bidir-enable 3662: interface Loopback0 ip address 10.28.35.71 255.255.255.255 h323-gateway voip interface h323-gateway voip id gk-qd.sd.fy ipaddr 10.28.159.66 1718 h323-gateway voip h323-id gw-lc-qd.sd.fy h323-gateway voip tech-prefix 1# h323-gateway voip bind srcaddr 10.28.35.71 ! interface FastEthernet0/0 ip address 10.28.136.254 255.255.255.0 ip access-group 115 in duplex auto speed auto ! interface FastEthernet0/1 no ip address no ip mroute-cache shutdown duplex auto speed auto no cdp enable ! interface Serial1/0 ip address 10.28.128.18 255.255.255.252 no fair-queue ! interface BRI1/0 no ip address encapsulation ppp no ip route-cache no ip mroute-cache dialer rotary-group 1 dialer-group 1 isdn switch-type basic-net3 isdn tei-negotiation first-call no cdp enable ppp multilink ! interface Dialer1 ip unnumbered FastEthernet0/0 encapsulation ppp dialer-group 1 peer default ip address pool isdn no cdp enable ppp authentication chap callin ! router ospf 66 log-adjacency-changes area 5 stub network 10.28.35.71 0.0.0.0 area 5 network 10.28.128.18 0.0.0.0 area 5 network 10.28.136.0 0.0.0.255 area 5 ! ip classless ip route 0.0.0.0 0.0.0.0 Serial1/0 ip route 0.0.0.0 0.0.0.0 10.28.34.24 150 ip route 10.28.150.160 255.255.255.224 10.28.136.253 ip route 10.28.157.20 255.255.255.252 10.28.136.253 no ip http server 我个人认为问题在3662上,但是一直找不到具体原因,请高手指点, 我查看路由表没什么问题,

不好意思，一个访问列表，不应该是它的问题

access-list 115 deny tcp any any eq 4444 access-list 115 deny udp any any eq tftp access-list 115 deny tcp any any eq 135 access-list 115 deny udp any any eq 135 access-list 115 deny tcp any any eq 139 access-list 115 deny udp any any eq netbios-ss access-list 115 deny tcp any any eq 445 access-list 115 deny udp any any eq 445 access-list 115 deny tcp any any eq 593 access-list 115 deny udp any any eq 593 access-list 115 deny tcp any any eq echo access-list 115 deny tcp any any eq chargen access-list 115 deny tcp any any eq 136 access-list 115 deny tcp any any eq 137 access-list 115 deny tcp any any eq 138 access-list 115 deny tcp any any eq 389 access-list 115 deny udp any any eq 136 access-list 115 deny udp any any eq netbios-ns access-list 115 deny udp any any eq 389 access-list 115 deny udp any any eq 1434 access-list 115 deny udp any any eq 1433 access-list 115 deny tcp any any eq 9996 access-list 115 deny tcp any any eq 5554 access-list 115 deny tcp any any eq 1068 access-list 115 permit ip any any dialer-list 1 protocol ip permit

找不到3662的下一跳，就是7609的串口地址