eXR :默认管理接口映射

问题

在ASR-9901上看不到第二个管理接口。

               Intf Intf LineP封装MTU BW

               名称状态状态类型（字节）(Kbps)

--------------------------------------------------------------------------------

                Nu0打开Null 1500 0

    Mg0/RSP0/CPU0/0上行ARPA 1514 1000000

          Gi0/0/0/0上行ARPA 1514 1000000

答案

在eXR中，一个MgmtEth可用于XR VM，另一个MgmtEth接口可用于管理VM。

CLI输出

P/0/RSP1/CPU0:ASR-9904-eXR#show interfaces brief | i Mg

10月10日周四08:07:37.708 HKT

    Mg0/RSP0/CPU0/0上行ARPA 1514 100000

    Mg0/RSP1/CPU0/0关闭ARPA 1514 1000000

RP/0/RSP1/CPU0:ASR-9904-eXR#admin

10月10日周四08:07:42.689 HKT

syzaidi使用sysadmin-vm:0_RSP0上的控制台从127.0.0.1连接

sysadmin-vm:0_RSP0# show interface ?

描述:管理接口

可能完成的任务：

  管理Eth0/RSP0/0/0

  管理Eth0/RSP1/0/0

  |输出修饰符

  <cr>

sysadmin-vm:0_RSP0# show interface

常见问题解答:

1)能否在管理VM中配置管理接口？ 

可以，它可按如下方式配置ip地址： 

sysadmin-vm:0_RSP0(config)# int MgmtEth 0/RSP0/0/0 ?
Possible completions:
  arp          Configure static ARP entry
  default-gw   Default Gateway address: A.B.C.D
  ipv4         IPv4 parameters
  mtu          MTU for interface
  shutdown     Shut the interface down
           
sysadmin-vm:0_RSP0(config)# 

2)我可以将此mgmt ip用于telnet/ssh访问还是带外访问？ 

否，此接口不对外公开。 

3)管理虚拟机中的管理接口有何用途？ 

此接口可用于使用mgmt将文件从路由器复制到外部位置。接口.

4)如果用户关闭管理VM中的mgmt接口，我们会失去对管理VM的访问吗？ 

否，关闭接口不会阻止对管理VM的访问，请检查以下项： 

sysadmin-vm:0_RSP0(config)# interface MgmtEth 0/RSP0/0/0
Wed Mar  31 19:20:15.547 UTC+00:00
sysadmin-vm:0_RSP0(config-MgmtEth-0/RSP0/0/0)# shut 
Wed Mar  31 19:20:19.472 UTC+00:00
sysadmin-vm:0_RSP0(config-MgmtEth-0/RSP0/0/0)# commit
Wed Mar  31 19:20:22.438 UTC+00:00
Commit complete.
sysadmin-vm:0_RSP0(config-MgmtEth-0/RSP0/0/0)# 
sysadmin-vm:0_RSP0(config-MgmtEth-0/RSP0/0/0)# 
sysadmin-vm:0_RSP0(config-MgmtEth-0/RSP0/0/0)# exit
Wed Mar  31 19:20:25.529 UTC+00:00
sysadmin-vm:0_RSP0(config)# exit
Wed Mar  31 19:20:27.353 UTC+00:00
sysadmin-vm:0_RSP0# 
sysadmin-vm:0_RSP0# 
sysadmin-vm:0_RSP0# sh int
Wed Mar  31 19:20:29.235 UTC+00:00
MgmtEth0/RSP0/0/0  Link encap: Ethernet  HWaddr 02:b3:90:92:72:98
  inet  addr: 0.0.0.0
  DOWN BROADCAST MULTICAST   MTU:1500  Metric:1    <<< port is down. 
  RX packets:          0 errors:0 dropped:0 overruns:0   frame:0
  TX packets:          5 errors:0 dropped:0 overruns:0 carrier:0
                         collisions:0 txqueuelen:1000
  RX bytes:                     0  TX bytes:                   398

sysadmin-vm:0_RSP0# exit
Wed Mar  31 19:20:34.518 UTC+00:00
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1#
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1#
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1#
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1#admin
Wed Mar 31 19:20:36.732 UTC

saavadha connected from 127.0.0.1 using console on sysadmin-vm:0_RSP0
sysadmin-vm:0_RSP0# exit  <<< we are still able to connect to the admin VM.
Wed Mar  31 19:20:41.461 UTC+00:00
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1#
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1#
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1#conf t
Wed Mar 31 19:20:44.587 UTC
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1(config)#exit   
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1#
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1#admin conf
Wed Mar 31 19:21:03.263 UTC
Mar 31 19:21:03 : ADMIN-CLI: ERROR: ABORT: Please run this command from admin prompt
RP/0/RSP0/CPU0:ASR-9904-E-eXR_NPE1#admin
Wed Mar 31 19:21:05.319 UTC

saavadha connected from 127.0.0.1 using console on sysadmin-vm:0_RSP0
sysadmin-vm:0_RSP0# con
Possible completions:
  config       Manipulate software configuration information
  controller   Access to hardware controller data
sysadmin-vm:0_RSP0# config 
Wed Mar  31 19:21:09.125 UTC+00:00
Entering configuration mode terminal
sysadmin-vm:0_RSP0(config)# interface MgmtEth 0/RSP0/0/0
Wed Mar  31 19:21:19.887 UTC+00:00
sysadmin-vm:0_RSP0(config-MgmtEth-0/RSP0/0/0)# no shut
Wed Mar  31 19:21:21.662 UTC+00:00
sysadmin-vm:0_RSP0(config-MgmtEth-0/RSP0/0/0)# commit
Wed Mar  31 19:21:23.798 UTC+00:00
Commit complete.
sysadmin-vm:0_RSP0(config-MgmtEth-0/RSP0/0/0)# exit
Wed Mar  31 19:21:25.293 UTC+00:00
sysadmin-vm:0_RSP0(config)# exit
Wed Mar  31 19:21:26.162 UTC+00:00
sysadmin-vm:0_RSP0# 
sysadmin-vm:0_RSP0# 
sysadmin-vm:0_RSP0# sh int
Wed Mar  31 19:21:27.967 UTC+00:00
MgmtEth0/RSP0/0/0  Link encap: Ethernet  HWaddr 02:b3:90:92:72:98
  inet  addr: 0.0.0.0
  UP RUNNING BROADCAST MULTICAST   MTU:1500  Metric:1
  RX packets:          0 errors:0 dropped:0 overruns:0   frame:0
  TX packets:         11 errors:0 dropped:0 overruns:0 carrier:0
                         collisions:0 txqueuelen:1000
  RX bytes:                     0  TX bytes:                   906

sysadmin-vm:0_RSP0#