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Ospf config

Skill nanxiaoyao/network-huawei-skills/ospf-config

This skill should be used when the user asks to configure or troubleshoot OSPF on Huawei switches (S1720/S2700/S5700/S6720 V200R011C10+ and CloudEngine 5800-9800 V200R022C00+) or USG firewalls. Covers multi-area OSPF, VLANIF-based OSPF on switches, DR/BDR election, Stub/NSSA areas, route import, route summarization, OSPF-BFD linkage, OSPF GR, and IP FRR. Applicable to both switch (VLANIF interface) and firewall (Layer-3 interface) scenarios.From its SKILL.md

Install
npx -y skills add nanxiaoyao/network-huawei-skills --skill ospf-config

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SKILL.md

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华为交换机/防火墙 OSPF 配置技能 (ospf-config)

适用平台 S1720/S2700/S5700/S6720 V200R011C10+ | CloudEngine 5800-9800 V200R022C00+ | USG6000E V600R007C20+ 文档来源 华为 S 系列与 CloudEngine 系列产品文档 (dc_cfg_ospf_*)

OSPF 是企业内网最常用的动态路由协议 交换机上跑在 VLANIF 三层接口 防火墙上跑在三层物理接口或子接口

触发场景

  • 配置交换机/防火墙 OSPF 多区域
  • VLANIF 接口跑 OSPF(交换机场景)
  • 三层接口跑 OSPF(防火墙场景)
  • OSPF 邻居建立不起来
  • 配置 DR/BDR 选举优先级
  • 配置 Stub / NSSA 区域
  • OSPF 引入外部路由 / 默认路由通告
  • OSPF 路由汇总
  • OSPF 与 BFD 联动(毫秒级切换)
  • OSPF GR(平滑重启)
  • OSPF IP FRR(快速重路由)
  • OSPF 路由过滤

交换机 vs 防火墙 接口差异

项目交换机防火墙
三层接口VLANIFGigabitEthernet / 10GE 物理口或子接口
IP 配置interface Vlanif 10 → ip addressinterface GigabitEthernet 0/0/1 → ip address
启 OSPF 前必须先创建 VLAN + 加接口必须先把接口加入安全区域
OSPF network用 VLANIF 网段用物理接口网段

配置六步走(交换机 VLANIF 场景)

1 创建 VLAN 与 VLANIF

system-view
vlan batch 10 20
interface Vlanif 10
 ip address 192.168.0.1 255.255.255.0
 quit
interface Vlanif 20
 ip address 192.168.1.1 255.255.255.0
 quit

2 物理接口加入 VLAN

interface GigabitEthernet 0/0/1
 port link-type trunk
 port trunk allow-pass vlan 10
 quit
interface GigabitEthernet 0/0/2
 port link-type trunk
 port trunk allow-pass vlan 20
 quit

3 创建 OSPF 进程与区域

ospf 1 router-id 10.1.1.1
 area 0.0.0.0
  network 192.168.0.0 0.0.0.255
  quit
 area 0.0.0.1
  network 192.168.1.0 0.0.0.255
  quit
 quit

4 验证

display ospf peer brief
display ospf routing
display ip routing-table protocol ospf

配置六步走(防火墙三层接口场景)

1 接口 IP 与安全区域

system-view
interface GigabitEthernet 0/0/1
 ip address 10.1.1.1 24
 quit
firewall zone untrust
 add interface GigabitEthernet 0/0/1
 quit

2 安全策略放通 OSPF

security-policy
 rule name ospf_out
  source-zone local
  destination-zone untrust
  service ospf
  action permit
 rule name ospf_in
  source-zone untrust
  destination-zone local
  service ospf
  action permit
 quit

3 OSPF 进程

ospf 1 router-id 1.1.1.1
 area 0.0.0.0
  network 10.1.1.0 0.0.0.255
  quit
 quit

高级场景

DR/BDR 选举(交换机场景)

调整接口 OSPF 优先级 数值大优先 0 表示不参与选举

interface Vlanif 10
 ospf dr-priority 100           # 高优先 当 DR
 ospf dr-priority 0             # 不参与选举 永远不是 DR
 ospf dr-priority 2             # 默认 1 可微调

⚠️ 改了优先级后必须 reset ospf process 重启进程才生效

Stub 区域

Area 内不传 Type-5 LSA(外部路由) ABR 下发默认路由

# ABR 端(连接 Area 0 和 Stub Area)
ospf 1
 area 0.0.0.1
  stub no-summary              # ABR 端:不发 Type-3 汇总
  quit

# Stub 区域内路由器
ospf 1
 area 0.0.0.1
  stub                         # 内部:声明 Stub
  quit

效果:Stub 区域路由器只收区域内路由 + 一条默认路由

NSSA 区域

允许引入外部路由(Type-7 LSA) ABR 转 Type-5 传入骨干

# ABR 端
ospf 1
 area 0.0.0.2
  nssa no-summary              # ABR:不发 Type-3 + 下发默认路由
  quit

# NSSA 内部路由器
ospf 1
 area 0.0.0.2
  nssa                          # 内部:声明 NSSA
  quit

引入外部路由

ospf 1
 import-route static type 1    # 引入静态路由 type-1(开销累加)
 import-route direct           # 引入直连
 import-route rip 1            # 引入 RIP
 quit

默认路由通告

ospf 1
 default-route-advertise always   # 始终下发默认路由(即使本端没有)
 default-route-advertise cost 10   # 下发 + 指定开销
 quit

路由汇总(ABR 上配置)

ospf 1
 area 0.0.0.1
  abr-summary 192.168.0.0 255.255.252.0    # 把 Area 1 的多个网段汇总
  quit

OSPF 与 BFD 联动(毫秒级切换)

# 1 全局启用 BFD
bfd
 quit

# 2 OSPF 进程启用 BFD
ospf 1
 bfd all-interfaces enable
 bfd all-interfaces min-tx-interval 100 min-rx-interval 100 detect-multiplier 3
 quit

BFD down → OSPF 立即感知邻居失效 毫秒级切换

OSPF GR(平滑重启)

设备重启时邻居不拆除 重启后快速恢复

ospf 1
 graceful-restart               # 启用 GR
 graceful-restart period 600     # GR 周期(秒)
 quit

OSPF IP FRR(快速重路由)

预计算备份路径 主路径故障时 50ms 内切换

ospf 1
 frr                            # 启用 FRR
 quit

路由过滤

# 过滤接收的路由
ospf 1
 filter-policy acl 2000 import
 quit

# 过滤发布的路由
ospf 1
 filter-policy acl 2001 export
 quit

命令体系

进程与区域

命令视图说明
ospf <pid> [ router-id <rid> ]system创建进程
area <area-id>ospf进入区域
network <ip> <wildcard>area宣告网段
undo network <ip> <wildcard>area撤销网段
ospf <pid> vpn-instance <vpn>systemVPN 实例 OSPF

接口 OSPF 参数

命令视图说明
ospf dr-priority <0-255>interfaceDR 优先级 默认 1
ospf cost <1-65535>interface接口开销
ospf network-type { p2p | broadcast | p2mp | nbma }interface网络类型
ospf timer hello <s>interfacehello 间隔 默认 10s
ospf timer dead <s>interfacedead 间隔 默认 40s
ospf authentication-mode { simple | md5 | hmac-sha256 }interface接口认证
ospf bfd enableinterface接口级 BFD
ospf frr blockinterface接口禁止 FRR

区域参数

命令视图说明
stub [ no-summary ]areaStub 区域
nssa [ no-summary ]areaNSSA 区域
abr-summary <ip> <mask>areaABR 汇总
asbr-summary <ip> <mask>ospfASBR 汇总
import-route <protocol> [ type <1|2> ] [ cost <n> ] [ tag <n> ]ospf引入外部路由
default-route-advertise [ always ] [ cost <n> ]ospf通告默认路由
filter-policy <acl/name> { import | export }ospf路由过滤
vlink-peer <rid>area虚链路

查看

命令说明
display ospf peer brief邻居概要
display ospf peer邻居详情
display ospf routingOSPF 路由表
display ospf lsdbLSDB
display ospf interface接口 OSPF 信息
display ospf error错误统计
display ip routing-table protocol ospf全局路由表 OSPF 部分
display ospf abr-asbrABR/ASBR 列表
display ospf bfd session allBFD 会话

经典 CLI 范式 交换机多区域 OSPF

来自 S 系列 CHM sec_cfg_ospf_1059

# Switch A(ABR 连 Area 0 + Area 1)
sysname SwitchA
vlan batch 10 20
interface Vlanif10
 ip address 192.168.0.1 255.255.255.0
interface Vlanif20
 ip address 192.168.1.1 255.255.255.0
interface GigabitEthernet 0/0/1
 port link-type trunk
 port trunk allow-pass vlan 10
interface GigabitEthernet 0/0/2
 port link-type trunk
 port trunk allow-pass vlan 20
ospf 1 router-id 10.1.1.1
 area 0.0.0.0
  network 192.168.0.0 0.0.0.255
 area 0.0.0.1
  network 192.168.1.0 0.0.0.255

# Switch B(Area 0 内部)
sysname SwitchB
vlan batch 10
interface Vlanif10
 ip address 192.168.0.2 255.255.255.0
interface GigabitEthernet 0/0/1
 port link-type trunk
 port trunk allow-pass vlan 10
ospf 1 router-id 10.2.2.2
 area 0.0.0.0
  network 192.168.0.0 0.0.0.255

# Switch C(Area 1 内部)
sysname SwitchC
vlan batch 20
interface Vlanif20
 ip address 192.168.1.2 255.255.255.0
interface GigabitEthernet 0/0/1
 port link-type trunk
 port trunk allow-pass vlan 20
ospf 1 router-id 10.3.3.3
 area 0.0.0.1
  network 192.168.1.0 0.0.0.255

常见陷阱

  • 交换机忘了创建 VLAN 或没把物理口加入 VLAN → VLANIF down → OSPF 起不来
  • 防火墙忘了放安全策略 → OSPF 报文被丢 → 邻居建不起来
  • router-id 冲突 → 邻居异常
  • 两端 hello/dead timer 不一致 → 邻居建不起来
  • network 宣告网段写反掩码(如写 255.255.255.0 而非 0.0.0.255)
  • Stub/NSSA 区域所有路由器必须一致配置(一端 stub 另一端没配 → 邻居拒绝)
  • DR 优先级改了没重启进程 → 不生效
  • VLANIF 没有 UP 的成员端口 → VLANIF 协议 down → OSPF 不生效

排查流程

OSPF 邻居建不起来
  |
  v
[1] display ospf peer brief → 有没有邻居?
  |
  ├─ 完全没有 → 走分支 A
  └─ 有但状态不是 Full → 走分支 B

分支 A 完全没有
  1. 两端 network 宣告是否正确(网段+反掩码)
  2. 接口 UP/UP?(VLANIF 有成员口?/ 物理口 up?)
  3. 防火墙:安全策略放通没?
  4. 两端区域 ID 是否一致

分支 B 非 Full 状态
  1. 2-Way → 广播网络正常(非 DR/BDR 只到 2-Way)
  2. Init → 单向 hello 检查 MTU / 认证
  3. ExStart/Exchange → MTU 不匹配 / 认证密钥错

相关文件

  • references/ospf-commands.md 完整命令速查
  • references/ospf-troubleshooting.md 故障排查

What ships with it: 2 files

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