网络工程 - 带有前门 VRF 的 Cisco IP SLA HTTP 请求 - 吾爱随笔录

我正在尝试在我的 Cisco ISR 4321 路由器上为 HTTP 使用 IP SLA 来检查网站是否可访问。挑战在于我需要在前门 VRF 中执行此操作。我已经配置

ip name-server vrf INET 8.8.8.8

ip domain-lookup vrf INET


ip sla 10
 http raw http://ifconfig.co name-server 8.8.8.8 cache disable
 vrf INET
 http-raw-request
  GET / HTTP/1.0\r\n
  exit
 threshold 2
 timeout 2
ip sla schedule 10 life forever start-time now

但是，结果是 DNS 错误

IPSLAs Latest Operation Summary
Codes: * active, ^ inactive, ~ pending
All Stats are in milliseconds. Stats with u are in microseconds

ID           Type        Destination       Stats       Return      Last
                                                       Code        Run
-----------------------------------------------------------------------
*10          http        0.0.0.0           RTT=0       DNS query e 25 seconds ag
                                                       rror        o

然而，DNS 正在那个 VRF 中工作

#ping vrf INET ifconfig.co
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 104.18.39.101, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 13/18/34 ms

知道我在这里缺少什么吗？