问

MSR800使用地址转换后，OSPF无法访问，删除地址转换正常。

2023-10-08提问

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gavien_168

gavien_168 零段

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问题描述：

如图的拓扑。在2台msr800设置了 ospf，邻接关系FULL。因为要上网，在2台msr800也设置了地址转换。

发现，如果设置了地址转换，能上网，但 192.168.2.0/24 就无法与 192.168.3.0/24 互通。把两台MSR800的地址转换删除了，192.168.2.0/24 就与 192.168.3.0/24 互通，但不能上网。请问要怎么做到，192.168.2.0/24 与 192.168.3.0/24 互通，又能上网呢？

组网及组网描述：

另外，如果想192.168.2.0/24与 192.168.3.0/24 互通，并且PC端用PPPOE拨号到PPPOE SVR (192.168.88.1),请教怎么设置呢？期望大神老师指点，感谢。

最佳答案

zhiliao_sEUyB

zhiliao_sEUyB 九段

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nat在路由器外网设备上做就可以了

[RT3]display ospf brief OSPF Process 1 with Router ID 3.3.3.3 OSPF Protocol Information RouterID: 3.3.3.3 Router Type: Route Tag: 0 Multi-VPN-Instance is not enabled Applications Supported: MPLS Traffic-Engineering ISPF is not enabled SPF-schedule-interval: 5 LSA generation interval: 5 LSA arrival interval: 1000 Transmit pacing: Interval: 20 Count: 3 Default ASE parameters: Metric: 1 Tag: 1 Type: 2 Route Preference: 10 ASE Route Preference: 150 SPF Computation Count: 10 RFC 1583 Compatible Graceful restart interval: 120 Area Count: 1 Nssa Area Count: 0 ExChange/Loading Neighbors: 0 Area: 0.0.0.3 (MPLS TE not enabled) Authtype: None Area flag: Normal SPF Scheduled Count: 10 ExChange/Loading Neighbors: 0 Interface: 3.3.3.3 (LoopBack0) Cost: 0 State: Loopback Type: PTP MTU: 1536 Timers: Hello 10, Dead 40, Poll 40, Retransmit 5, Transmit Delay 1 Interface: 192.168.3.1 (Vlan-interface1) Cost: 1 State: DR Type: Broadcast MTU: 1500 Priority: 1 Designated Router: 192.168.3.1 Backup Designated Router: 0.0.0.0 Timers: Hello 10, Dead 40, Poll 40, Retransmit 5, Transmit Delay 1 Interface: 192.168.88.199 (GigabitEthernet0/0) Cost: 1 State: BDR Type: Broadcast MTU: 1500 Priority: 1 Designated Router: 192.168.88.196 Backup Designated Router: 192.168.88.199 Timers: Hello 10, Dead 40, Poll 40, Retransmit 5, Transmit Delay 1 [RT3]

gavien_168 发表时间：2023-10-08

外网路由器已经做好策略，192.168.88.0/24都能上网的。2个MSR800是自动获取IP（88.X）带两网段的。

gavien_168 发表时间：2023-10-08

配置静态地址吧，不要自动获取

zhiliao_sEUyB 发表时间：2023-10-08

回复zhiliao_sEUyB:

老师，是不是，静态与动态不是很主要，在ospf 中设置的是 192.168.2.0 0.0.0.255 的反掩码。

gavien_168 发表时间：2023-10-08

外网路由器看下路由情况

zhiliao_sEUyB 发表时间：2023-10-08

[admin@MikroTik] /ip route> print Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme, B - blackhole, U - unreachable, P - prohibit # DST-ADDRESS PREF-SRC GATEWAY DISTANCE 0 A S 0.0.0.0/0 192.168.168.1 1 1 ADC 192.168.88.0/24 192.168.88.1 bridge1 0 2 ADC 192.168.168.0/24 192.168.168.253 wan 0

gavien_168 发表时间：2023-10-08

3 个回答

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恋雨

恋雨三段

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在两台路由器之间建立GRE隧道，然后在隧道接口地址上宣告OSPF。

感谢。正解

gavien_168 发表时间：2023-10-11

gavien_168

gavien_168 知了小白

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[RT3]display ospf brief

OSPF Process 1 with Router ID 3.3.3.3
OSPF Protocol Information

RouterID: 3.3.3.3 Router Type:
Route Tag: 0
Multi-VPN-Instance is not enabled
Applications Supported: MPLS Traffic-Engineering
ISPF is not enabled
SPF-schedule-interval: 5
LSA generation interval: 5
LSA arrival interval: 1000
Transmit pacing: Interval: 20 Count: 3
Default ASE parameters: Metric: 1 Tag: 1 Type: 2
Route Preference: 10
ASE Route Preference: 150
SPF Computation Count: 10
RFC 1583 Compatible
Graceful restart interval: 120
Area Count: 1 Nssa Area Count: 0
ExChange/Loading Neighbors: 0

Area: 0.0.0.3 (MPLS TE not enabled)
Authtype: None Area flag: Normal
SPF Scheduled Count: 10
ExChange/Loading Neighbors: 0

Interface: 3.3.3.3 (LoopBack0)
Cost: 0 State: Loopback Type: PTP MTU: 1536
Timers: Hello 10, Dead 40, Poll 40, Retransmit 5, Transmit Delay 1

Interface: 192.168.3.1 (Vlan-interface1)
Cost: 1 State: DR Type: Broadcast MTU: 1500
Priority: 1
Designated Router: 192.168.3.1
Backup Designated Router: 0.0.0.0
Timers: Hello 10, Dead 40, Poll 40, Retransmit 5, Transmit Delay 1

Interface: 192.168.88.199 (GigabitEthernet0/0)
Cost: 1 State: BDR Type: Broadcast MTU: 1500
Priority: 1
Designated Router: 192.168.88.196
Backup Designated Router: 192.168.88.199
Timers: Hello 10, Dead 40, Poll 40, Retransmit 5, Transmit Delay 1
[RT3]

**************************************************

[RT3]display ospf peer

OSPF Process 1 with Router ID 3.3.3.3 Neighbor Brief Information Area: 0.0.0.3 Router ID Address Pri Dead-Time Interface State 2.2.2.2 192.168.88.196 1 33 GE0/0 Full/DR [RT3]