Error: Conflicting default route declarations for IPv4 (table: main, metric: def

admin

Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in enp9s0 but also in vlan3
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, q0 K3 c% u7 K* q* Y网卡重启却能ping通外网
Error: Conflicting default route declarations for IPv4 (table: main, metric: default)

root@localhost:~# netplan apply
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** (generate:62439): WARNING **: 07:58:24.498: `gateway4` has been deprecated, use default routes instead.
7 m  b9 ~7 A3 MSee the 'Default routes' section of the documentation for more details.
# h4 T+ T- @& l5 T- ~9 D
** (generate:62439): WARNING **: 07:58:24.498: `gateway4` has been deprecated, use default routes instead.
, q' V4 M* R: _4 ?% B3 }- `See the 'Default routes' section of the documentation for more details.
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- y1 i  Q3 B! b* b% E** (generate:62439): WARNING **: 07:58:24.498: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in enp9s0 but also in vlan3

% k0 _7 F) I- w- h** (process:62437): WARNING **: 07:58:24.812: `gateway4` has been deprecated, use default routes instead.
2 ]  y$ }4 o9 g% n5 m+ V2 ^See the 'Default routes' section of the documentation for more details.

** (process:62437): WARNING **: 07:58:24.812: `gateway4` has been deprecated, use default routes instead.
+ S8 C  q) n3 N/ E: ]See the 'Default routes' section of the documentation for more details.

** (process:62437): WARNING **: 07:58:24.812: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in enp9s0 but also in vlan3
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( q+ K2 I- G- u6 M  R** (process:62437): WARNING **: 07:58:24.822: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.
$ P/ x$ X4 }' g
$ u8 a- \0 q/ |& i% s- ?** (process:62437): WARNING **: 07:58:24.822: `gateway4` has been deprecated, use default routes instead.
* F. t: E& i8 u6 e* ]See the 'Default routes' section of the documentation for more details.
/ h; h. ~  q) \8 J
3 {2 x- N- |+ t- R% ^8 Z** (process:62437): WARNING **: 07:58:24.822: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
) s; t2 N5 e: m5 [* PError: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in enp9s0 but also in vlan3

% c& |( _! z2 o** (process:62437): WARNING **: 07:58:25.134: `gateway4` has been deprecated, use default routes instead.
6 E, i& R7 Q! r# h$ V  KSee the 'Default routes' section of the documentation for more details.

** (process:62437): WARNING **: 07:58:25.134: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.
6 s  D7 e5 F9 s/ Z( d- ^
( L6 |0 R5 W/ E$ M% H3 J** (process:62437): WARNING **: 07:58:25.134: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
! V6 z9 D8 h7 R9 K+ @8 wError: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in enp9s0 but also in vlan3
, P" ^( Y% F5 F# o( ?' t
4 m2 N3 Q+ Q% l** (process:62437): WARNING **: 07:58:25.134: `gateway4` has been deprecated, use default routes instead.
See the 'Default routes' section of the documentation for more details.
' }2 @! t# Q6 e. i( ~
** (process:62437): WARNING **: 07:58:25.134: `gateway4` has been deprecated, use default routes instead.
- S# U/ P8 ]9 @' X0 kSee the 'Default routes' section of the documentation for more details.

** (process:62437): WARNING **: 07:58:25.135: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in enp9s0 but also in vlan3

$ C# ?1 ]: G7 f0 e) }! h  Y
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admin

但是 $ sudo netplan apply 出现警告和报错
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. w! z1 B! z9 v# E- P/ s. T$ z0 B ** (generate:2624): WARNING **: 02:29:33.628: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
! w# d1 z5 y  ?2 x5 ` Error: Conflicting default route declarations for IPv4 (table: main, metric: 100), first declared in enp0s8 but also in enp0s3
  F& X' e) e7 v; h* m% l+ h3 O4 z1 q
** (process:2622): WARNING **: 02:29:34.210: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
Error: Conflicting default route declarations for IPv4 (table: main, metric: 100), first declared in enp0s8 but also in enp0s3

7 }2 b* i, i+ R2 f" Y# t, g
6 w, ]- }; T9 E3 ]# w: t, p$ y$ ip route list

default via 192.168.0.1 dev enp0s8 proto static metric 100
default via 12.34.56.1 dev enp0s3 proto static metric 100
192.168.0.0/24 dev enp0s8 proto kernel scope link src 192.168.0.5
12.34.560/28 dev enp0s3 proto kernel scope link src 12.34.56.78
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$ ?" o8 u7 ^' M: N4 ?1 T' X
会发现确实出现 2 个 default
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. u! b* i" B7 \' H) B# I3 F( I  `当时在实际环境，着急使用，所以，简单删除了内网的route，可以正常使用了
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$ sudo ip route del 192.168.0.1
2 L2 g5 B$ z3 @6 ~- |, V2 r  X其实只是改变了 2 个 default 的次序

今天重新思考并测试：
( B# {( N; o% ]既然外网已经有网关，那么，服务器访问外网不会有问题
: n  N6 n- A4 v内网访问其他资源，应该仅限于内网区域，所以，修改他的 to 就应该可以了！
7 E  W4 e# H$ B5 p/ Y; C
$ cat 00-installer-config.yaml
修改一下即可

   routes:
     - to: 192.168.0.0/24 # 0.0.0.0/0
, J, g( p3 z( ]9 Y       via: 192.168.0.1
       metric: 100
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- k( d0 @2 N  d6 x( Q$ K/ ?再次 $ sudo netplan apply 不再报错和警告
% h/ g& U( c4 e' L  a5 s7 N7 Y
$ ip route list

default via 12.34.1 dev enp0s8 proto static metric 100
& v3 b6 S4 F3 c: M/ z 192.168.0.0/24 dev enp0s3 proto kernel scope link src 192.168.0.5
192.168.0.0/24 via 192.168.0.81 dev enp0s3 proto static metric 100
12.34.56.0/28 dev enp0s8 proto kernel scope link src 12.34.56.78
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$ {5 I7 }; r  E6 x: b. ^
现在只有一个 default 了
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9 P( [* O! T1 M, x4 f其他
! m+ s/ }9 n- D& b8 x安装设置虚拟机时，特意将外网卡放在前面，但是，不知道为什么，他竟然网卡名字对应反了，结果，apt update 时报错，ping 外网死活不通！
改正过来就好了！

admin

解决方法：
% h4 m+ ]$ [) q+ ~! G- Tnetplan apply会根据gateway4生成默认路由，保留一个gateway4即可
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