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ubuntu 系统配置网卡，直接networking restart失败。使用ifup interface 才生效

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发表于 2022-1-12 11:27:15 | 显示全部楼层 |阅读模式

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root@controller:~# vim /etc/network/interfaces1 }) p/ J' M2 f. G" \1 s
interfaces    interfaces.d/
; n; C. E; I( Y. mroot@controller:~# vim /etc/network/interfaces1 h( \" @& x: d! _* g, i2 Y2 x
root@controller:~# service networking restart3 J4 G2 ?2 V# d
stop: Job failed while stopping
, y4 n2 e  e% I* t" G1 ~: Rstart: Job is already running: networking
; v# r- ]0 l% g3 W4 ~) troot@controller:~# ip addr
: l8 u* \5 `3 L8 S; @, {1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default $ g. j9 E+ ?7 a' i$ [
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2 g- Q: f) w0 }: I8 W    inet 127.0.0.1/8 scope host lo
/ {( t' o5 f3 `) X4 j0 ]$ l       valid_lft forever preferred_lft forever
$ {5 j& U4 n  _' M    inet6 ::1/128 scope host * l; v' T# a: o5 \$ c
       valid_lft forever preferred_lft forever
) f/ x0 R& m% ?, q2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000# Z" E- g" Q* _) n  g5 B8 l
    link/ether 00:0c:29:8c:59:8c brd ff:ff:ff:ff:ff:ff
1 l' s2 y& z1 ^) v* S  A3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 10004 c% j. ]: K& j
    link/ether 00:0c:29:8c:59:96 brd ff:ff:ff:ff:ff:ff# d  ^6 J8 Q+ E3 Y2 _8 J
4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
8 h" W6 _$ f" y# `1 H5 R" X" x    link/ether 00:0c:29:8c:59:a0 brd ff:ff:ff:ff:ff:ff
7 x$ @% D6 `$ }9 A- M; u! ]% H% d5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 10004 [! h/ m1 M# I9 T  X- r& F
    link/ether 00:0c:29:8c:59:aa brd ff:ff:ff:ff:ff:ff, u; b! x! l+ G+ T3 I5 B/ v
    inet 192.168.13.3/24 brd 192.168.13.255 scope global eth3
' U8 C9 ]" w* m; H       valid_lft forever preferred_lft forever# N- g9 {+ N1 T
    inet6 fe80::20c:29ff:fe8c:59aa/64 scope link
: v2 d$ C5 x# i, y/ C1 g$ l2 r2 M       valid_lft forever preferred_lft forever
( N6 k5 f2 n. I+ O- t- _root@controller:~# /etc/init
3 A+ Q" |/ ?: R. o- k: U1 n' Zinit/            init.d/          initramfs-tools/   y1 A* ~6 d6 }  ^
root@controller:~# /etc/init.d/networking restart( ~% ^3 i5 I8 H* E  U1 b4 h$ p5 g
root@controller:~# ip addr/ ]' v, }' V' r- o5 s. w) X4 u8 z
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default ' u1 R* H+ j2 l/ l! K8 }7 h3 S
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00, B8 B% }3 C; E3 V0 w
    inet 127.0.0.1/8 scope host lo
7 J7 C: a% r' _) u. p# C       valid_lft forever preferred_lft forever
; n$ F2 O/ K  J; }    inet6 ::1/128 scope host
& o5 q. |- X7 I& n" H' i* `       valid_lft forever preferred_lft forever
5 o' ]* v) P4 I2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000# `  ~1 C" C4 f1 t0 p
    link/ether 00:0c:29:8c:59:8c brd ff:ff:ff:ff:ff:ff% I; H; \1 _  l
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000$ J7 ?/ \% _$ N' c- O6 s
    link/ether 00:0c:29:8c:59:96 brd ff:ff:ff:ff:ff:ff! f+ n( j, y8 X! z. A) a
4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
) S5 ]/ M2 x5 N7 J" P    link/ether 00:0c:29:8c:59:a0 brd ff:ff:ff:ff:ff:ff! c, z0 ~6 ~$ d0 C7 B; Q
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
% @- z7 I( w$ Z9 |% j' [    link/ether 00:0c:29:8c:59:aa brd ff:ff:ff:ff:ff:ff
* a5 U; V9 r% H    inet 192.168.13.3/24 brd 192.168.13.255 scope global eth3/ P& i/ i! y2 y/ v
       valid_lft forever preferred_lft forever+ m5 J% a- T2 x# |
    inet6 fe80::20c:29ff:fe8c:59aa/64 scope link
% ]' o* e% ~% f2 b0 t2 W       valid_lft forever preferred_lft forever/ r6 U' e8 Y- A1 A2 A1 G1 m
root@controller:~# ifup eth0
, S: Y, h) I* o  D: ^& WInternet Systems Consortium DHCP Client 4.2.4
! `# `% q. u2 {7 C% iCopyright 2004-2012 Internet Systems Consortium.0 a" y; u! |! U$ b; G( N
All rights reserved.
! W. W2 l- G; f4 y$ ?7 P( t; g9 o. @5 gFor info, please visit https://www.isc.org/software/dhcp/
* t  Y3 n- p; b7 @' CListening on LPF/eth0/00:0c:29:8c:59:8c
2 p  _# t* G. _  G9 {' I# j8 uSending on   LPF/eth0/00:0c:29:8c:59:8c; H2 v% a2 _: p$ r( h/ Z% r
Sending on   Socket/fallback
: q4 J0 w* L- n/ ~DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0xeb67d11f)
$ X2 E3 Q9 r, h; d
9 F7 w/ C& m. J' I  S) jDHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0xeb67d11f)1 r6 U3 r/ l6 W

" T, o/ N; u, u$ h. |, E# `7 X. T3 P# U- w- U! k
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8 (xid=0xeb67d11f)+ H* ^9 R! O) |, x( V& b: t

; M7 F& R# I" c- M1 A+ X- W- b7 t" [4 e5 T' F7 Y  m
root@controller:~# ip addr+ K' X" {) N  H# R1 K3 B! P) l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default # U& S  H: X2 L$ ]$ U, ^
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00) i( {: \* q0 e; Z! h" p
    inet 127.0.0.1/8 scope host lo( ^$ g7 a6 D6 ]% R1 n
       valid_lft forever preferred_lft forever
6 L; m- r+ H0 }* r9 u    inet6 ::1/128 scope host + A: K3 h0 k% w
       valid_lft forever preferred_lft forever
& Q2 |- F  b# k2 D& Y: P2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
: i! L. n) Y6 l  Y, F. O    link/ether 00:0c:29:8c:59:8c brd ff:ff:ff:ff:ff:ff
5 [2 M3 {8 y$ A: c1 c6 {8 s" _    inet6 fe80::20c:29ff:fe8c:598c/64 scope link ' f% }# ^- Y+ a  p) `! i$ @+ M
       valid_lft forever preferred_lft forever
  [* ~$ K8 C5 V9 J% r( \+ m3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
+ Q" Z% A8 M9 P5 N6 {    link/ether 00:0c:29:8c:59:96 brd ff:ff:ff:ff:ff:ff/ r& x- }& k; {& z5 N" s
4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000  `% u0 H, I* F. C% @* d
    link/ether 00:0c:29:8c:59:a0 brd ff:ff:ff:ff:ff:ff
% F& G+ c% y2 x3 v* \  j: P5 E9 z5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
; }6 I& o' s" P    link/ether 00:0c:29:8c:59:aa brd ff:ff:ff:ff:ff:ff3 m% H# H# L: _4 U4 Y
    inet 192.168.13.3/24 brd 192.168.13.255 scope global eth35 }1 F9 J7 t' {& q% \4 u
       valid_lft forever preferred_lft forever
; T; F4 n% E% Q7 v+ c: ?8 V    inet6 fe80::20c:29ff:fe8c:59aa/64 scope link
9 b3 m9 N" j& g$ X3 Z       valid_lft forever preferred_lft forever
- R; t' i9 y3 U% A/ _# D3 R/ [% Sroot@controller:~# ifup eth1
: A! O; [, u& |- x7 z' @7 oInternet Systems Consortium DHCP Client 4.2.4
' h2 S! K' K( H' F$ xCopyright 2004-2012 Internet Systems Consortium.
* i- v8 e. ]' p5 l) V. ~* }All rights reserved.% a6 G. R' N) V, M
For info, please visit https://www.isc.org/software/dhcp/
! b5 _3 d2 S' w. lListening on LPF/eth1/00:0c:29:8c:59:963 U3 L" u1 m7 s$ U
Sending on   LPF/eth1/00:0c:29:8c:59:966 ^) k' Q/ T) S" G$ [# N- _1 O. B9 Z& N
Sending on   Socket/fallback
( x8 X# z. o: l& `2 W5 QDHCPDISCOVER on eth1 to 255.255.255.255 port 67 interval 3 (xid=0x21870d6a)
  K- E" D( h6 ?7 e# A* l+ ODHCPREQUEST of 171.10.91.128 on eth1 to 255.255.255.255 port 67 (xid=0x6a0d8721)
+ C+ z( j/ n/ D* YDHCPOFFER of 171.10.91.128 from 171.10.91.254
9 E# B+ v  B5 C6 n+ Z0 T: N! i: wDHCPACK of 171.10.91.128 from 171.10.91.254
' r  Y% n5 J- h" p2 T) V4 Xbound to 171.10.91.128 -- renewal in 899 seconds.0 ~  D0 e: i0 o+ {
root@controller:~#   r( p- W" M  d8 e/ u) ?8 f
root@controller:~# 3 a$ d0 p/ r3 F7 d' `+ b, s
root@controller:~# 9 ~; O9 ]. Q% M
root@controller:~# ifup eth0
+ ?$ L1 h. X- ^* V2 b( ?& {) {ifup: interface eth0 already configured7 p' d  r2 W. k3 `2 t2 q& @% |
root@controller:~# ifup eth25 T7 }& c& y+ Z3 x8 q8 k5 k
Internet Systems Consortium DHCP Client 4.2.4
8 i, s. `8 ]% @$ n% _Copyright 2004-2012 Internet Systems Consortium.5 u+ G* M6 e1 w' R/ |2 W- }
All rights reserved.
; B  S" O$ W3 eFor info, please visit https://www.isc.org/software/dhcp/, _3 h, w  S& k$ J6 R/ t+ ^7 t
Listening on LPF/eth2/00:0c:29:8c:59:a0% t) g1 B6 m) X4 M. u
Sending on   LPF/eth2/00:0c:29:8c:59:a09 `1 J) b7 t2 S2 ^# B4 K
Sending on   Socket/fallback
* Z4 W& o9 K1 O( V( M2 l" R- S  PDHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x685a54b)
/ c1 \8 }/ J4 }* BDHCPREQUEST of 162.96.90.128 on eth2 to 255.255.255.255 port 67 (xid=0x4ba58506)
2 x; t) I6 |0 e0 MDHCPOFFER of 162.96.90.128 from 162.96.90.254' d( M* a  j' Y3 P) H
DHCPACK of 162.96.90.128 from 162.96.90.254
% z/ u) u& y- ubound to 162.96.90.128 -- renewal in 823 seconds.8 V' Y- b4 R$ C3 k
root@controller:~# ip addr6 E6 f+ l: Y& w; ~' A
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default * V* c5 C) t. r7 a0 p9 `0 C
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
* v" k1 V$ T# k3 E    inet 127.0.0.1/8 scope host lo/ ]! a5 y# H# R  p# P
       valid_lft forever preferred_lft forever
& h6 u9 B0 \% d; j% a1 P! [    inet6 ::1/128 scope host
3 p0 B" |' u4 F       valid_lft forever preferred_lft forever
2 b) O2 N! f, |2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000/ H) ~3 ?4 [9 N. `* c  H" G
    link/ether 00:0c:29:8c:59:8c brd ff:ff:ff:ff:ff:ff- S/ s8 b  w6 B3 {2 O
    inet6 fe80::20c:29ff:fe8c:598c/64 scope link % z' l5 M+ A* {% E! k  _
       valid_lft forever preferred_lft forever
0 X, }3 o# J0 r& I( g3 t3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
9 w6 \4 {6 b% a) i    link/ether 00:0c:29:8c:59:96 brd ff:ff:ff:ff:ff:ff6 X4 f2 B0 S! l9 n1 y* a6 X5 b
    inet 171.10.91.128/24 brd 171.10.91.255 scope global eth1" F9 ^/ B7 T- D0 Y% u
       valid_lft forever preferred_lft forever
* x: b! z+ c$ q# B2 H1 L  y1 N    inet6 fe80::20c:29ff:fe8c:5996/64 scope link 3 z/ H( s; w  m& \+ l
       valid_lft forever preferred_lft forever
. N# ~6 d9 H! F+ Z6 e2 F4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
$ [6 ~/ M4 `7 \% b3 u$ Z. @- D    link/ether 00:0c:29:8c:59:a0 brd ff:ff:ff:ff:ff:ff" H4 p/ q) D6 _; h
    inet 162.96.90.128/24 brd 162.96.90.255 scope global eth25 _9 [! R2 s6 j; l1 U  j+ D8 r0 y& C
       valid_lft forever preferred_lft forever6 V) T- H5 U1 J0 `& M5 ]
    inet6 fe80::20c:29ff:fe8c:59a0/64 scope link " o+ M3 z% d7 m! v0 ]3 ?
       valid_lft forever preferred_lft forever' a: `3 \  c8 B9 q
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000& W2 g  o. _& f9 m1 \
    link/ether 00:0c:29:8c:59:aa brd ff:ff:ff:ff:ff:ff$ n. h  b! g- j* W- N
    inet 192.168.13.3/24 brd 192.168.13.255 scope global eth36 C4 `! t, u6 I# a$ M9 y! l
       valid_lft forever preferred_lft forever1 K& C% ~# X6 H+ `" A* _  y. K
    inet6 fe80::20c:29ff:fe8c:59aa/64 scope link
4 _% c) X5 C4 q0 h7 a       valid_lft forever preferred_lft forever
+ Q1 v, S% N% |; u3 W. Z/ B# o" Groot@controller:~# reboot
$ Z1 }1 u  Y. n5 Broot@controller:~# , y/ m( [7 @5 j# @
Broadcast message from root@controller3 N) q  v4 U! d; Z' b( Z
(/dev/pts/0) at 11:25 ...' W) A8 K* I) v1 A! t5 r, o# B+ _
The system is going down for reboot NOW!, s2 C2 A0 }* B+ J( W, U& C0 a+ O' N

! a, p6 {8 [. w9 t1 d  E: n6 g
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admin
 楼主| 发表于 2022-1-12 11:28:47 | 显示全部楼层
Ubuntu14.04修改配置，重启网卡没有生效，出现如下问题：
  }# P% o  @( T
( E) P, K* a- p7 ~3 b8 l( Y# cat /etc/issue4 [% m6 x% f; r- G7 B" v
Ubuntu 14.04 LTS \n \l
8 F( ]1 g# z& i- r* R) L. i& p; E# service  networking restart
! ?4 J# z8 C, \stop: Job failed while stopping6 @, i3 G* A! A/ p  u1 F) c* X$ b9 K
start: Job is already running: networking
. H0 D# [: ^' S: U4 N9 ?# tail -f /var/log/upstart/networking.log6 _! }1 t1 w. y9 R
Stopping or restarting the networking job is not supported.
3 A+ X( g* c+ D# |; aUse ifdown & ifup to reconfigure desired interface.
& X( |! g7 C& k9 t9 j* K7 C. T$ ?从以上日志内容可以看出，传统的service重启和停止网络已经不再支持了，需要通过使用ifdown & ifup来实现相应的操作。( B! t. ?8 M5 B7 h) y- [1 b/ {. Y

( c! j9 o3 f4 A2 T: n重启指定网卡+ d: h- ^" X+ ?7 a( P2 a9 W, e" V$ f
# ifdown eth0 && ifup eth03 W$ O" I5 E+ S( m
重启除lo网卡的所有网卡1 K( M4 q$ w& a& e. x3 _
# ifdown --exclude=lo -a && sudo ifup --exclude=lo -a
5 M  M. p8 N: i) Y% r配置桥接
% G+ f( g% o( \3 o3 {) R+ a6 q2 j# apt-get install bridge-utils, J6 d& E9 h+ U
# cat /etc/network/interfaces3 G4 N( B% [  y' W( k. ~
auto lo, Q4 B; Z5 I3 W* t6 |
iface lo inet loopback
' K4 e) g5 t6 H  ^
3 N) d* T7 ^6 ]7 {: ]. H) oauto eth0
+ N, i9 G0 G; y) c0 g5 kiface eth0 inet manual
9 p& A0 i- f& s$ S' J
4 w* V0 `+ `7 p, r+ ?auto br08 b8 d1 R' ?; h9 D$ v
iface br0 inet static
: a7 p, O5 z$ E9 yaddress 192.168.0.10
: ~" h3 j6 K+ Z* i% knetmask 255.255.255.0- B! |8 G! F5 Y( }" \8 _
gateway 192.168.0.1
5 F" I$ k5 V/ u6 K4 T4 R5 Sbridge_ports eth0- K. c; G. ^& N
bridge_stp off
& Y; R$ |! p  Y  Z. E7 @bridge_fd 0& e6 F' n$ m' @4 z  l. O: b: H
bridge_maxwait 0$ g6 h: c/ a  e, J# V
dns-nameservers 192.168.0.1
! h% Z# B( Q6 C  k( C& L, U9 E# ifup br0
% G2 ]7 R* l" e! z- Z# brctl  show9 m. X$ o8 I" p
bridge name   bridge id       STP enabled interfaces0 k6 W3 u5 q" ]' y( p
br0       8000.02000a0080e1   no      eth0
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 楼主| 发表于 2022-1-12 11:32:22 | 显示全部楼层
root@controller:~# vim /etc/network/interfaces
3 r' D# T+ z  ?+ m9 Cauto eth3+ v* }7 |$ k0 J: G
iface eth3 inet static
! p! _$ s2 g* p8 u& a; ?" Oaddress 192.168.13.155
1 R( Z' E' t; M4 Dnetmask 255.255.255.07 X5 K& r7 D/ f# C2 y% u
gateway 192.168.13.2
) t) p7 f  J9 F5 K4 `dns-nameservers 114.114.114.114' a. A; B- a0 Z" ^7 X

- b9 [9 L) Q0 x" r  @保存退出，重新启动网卡：' ~( S3 u/ f$ |8 K) N  O5 b: i: ~
ifdown eth3 && ifup eth3 &
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 楼主| 发表于 2022-1-12 11:44:03 | 显示全部楼层
root@controller:~# vim /etc/network/interfaces
9 E" ?+ s2 I& N8 Z1 Troot@controller:~# ifdown eth1 eth2
" ~- ~7 A$ ^% X, R) Groot@controller:~# ip addr9 h# T  N& ~/ l1 E
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
& h6 h5 d, s* P( j' x    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
# D5 u) s( [$ z6 [# {    inet 127.0.0.1/8 scope host lo
4 f) [0 x6 y- @# G0 M- L       valid_lft forever preferred_lft forever  e! t7 P; b3 U+ r
    inet6 ::1/128 scope host ' t. r: N8 U4 P  t+ |6 Y& `
       valid_lft forever preferred_lft forever$ x8 ^! v0 y5 ^, x8 {! [! L6 b
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
4 i6 r6 j9 Y- y  C5 G, _    link/ether 00:0c:29:8c:59:8c brd ff:ff:ff:ff:ff:ff
. @. n; [6 K! G9 L    inet6 fe80::20c:29ff:fe8c:598c/64 scope link # s) p/ T5 d3 N( |" D& n. G
       valid_lft forever preferred_lft forever
% a1 y: ~% e1 l4 ?+ I# a  f3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
' J, ]8 W, _2 L& s    link/ether 00:0c:29:8c:59:96 brd ff:ff:ff:ff:ff:ff
5 g$ s/ M/ S1 v( M- W5 G4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
& E# x* n. @  ?. i7 z" @5 D    link/ether 00:0c:29:8c:59:a0 brd ff:ff:ff:ff:ff:ff  K3 Z: C' f- c
5: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000: v! w- f+ {1 ^# T/ C% b
    link/ether 00:0c:29:8c:59:aa brd ff:ff:ff:ff:ff:ff9 K9 T7 I7 M% L2 [; \* G" I
    inet 192.168.13.155/24 brd 192.168.13.255 scope global eth3) R0 n4 n$ C4 t- |7 B
       valid_lft forever preferred_lft forever
% \' H8 ^! D1 R# Y+ j    inet6 fe80::20c:29ff:fe8c:59aa/64 scope link : t( s# ?9 ]1 R  g
       valid_lft forever preferred_lft forever$ B  g; u7 W, s
root@controller:~# ifup  eth1 eth2
: Y, o! S  U/ `9 t% y: ]Error: an inet prefix is expected rather than "171.10.91.128/255.255.225.0".4 [2 \% j5 q' w; {
Failed to bring up eth1.
( C) g8 p& E, {Error: an inet prefix is expected rather than "162.96.90.155/255.255.225.0".
3 \+ V1 G. b$ C) q! LFailed to bring up eth2.
7 v& w2 s' {+ J  K' f( d0 Q' m/ e$ u  A% s; V
root@controller:~# ifdown  eth1 eth2
" T7 y$ _) q$ D7 @5 t+ \root@controller:~# ifup  eth1 eth2
" Q- U4 q+ _' c; u) Qroot@controller:~# 7 J. u* P* K$ R5 W/ U, \6 u8 n  d5 y; z

1 Q/ ~; N( o$ D& P% C
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