发布时间: 2018-03-19 | 浏览次数: 2394 | 下载次数: 25 | 作者: SU1003078401 | 文档编号: EKB1001413135
静态路由与NQA联动,链路断开之后静态路由未切换。
配置如下:
ip route-static 0.0.0.0 0.0.0.0 172.36.1.1 track nqa user test
查看NQA实例,发现已经处于100%丢包。
5 . Test 982 result The test is finished
Send operation times: 2 Receive response times: 0
Completion:no result RTD OverThresholds number: 0
Attempts number:1 Drop operation number:0
Disconnect operation number:0 Operation timeout number:1
System busy operation number:1 Connection fail number:0
Operation sequence errors number:0 RTT Status errors number:0
Destination ip address:110.185.172.129
Min/Max/Average Completion Time: 0/0/0
Sum/Square-Sum Completion Time: 0/0
Last Good Probe Time: 0000-00-00 00:00:00.0
Lost packet ratio: 100 %
<FP-CD-CORE-SW1(2)>dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 25 Routes : 25
Destination/Mask Proto Pre Cost Flags NextHop Interface
0.0.0.0/0 Static 60 0 RD 172.36.1.1 XGigabitEthernet1/0/24
1 查看配置信息,怀疑配置参数之间不匹配:
nqa test-instance user test
test-type icmp
destination-address ipv4 110.185.x.x
frequency 5
interval seconds 5
timeout 4
probe-count 2
start now
#
ip route-static 0.0.0.0 0.0.0.0 172.36.1.1 track nqa user test
#
2 进一步分析NQA实例统计,丢包虽然100%丢包,但实际上NQA实例一直处于无结果的状态。
5 . Test 982 result The test is finished
Send operation times: 2 Receive response times: 0
Completion:no result RTD OverThresholds number: 0
Attempts number:1 Drop operation number:0
Disconnect operation number:0 Operation timeout number:1
System busy operation number:1 Connection fail number:0
Operation sequence errors number:0 RTT Status errors number:0
Destination ip address:110.185.172.129
Min/Max/Average Completion Time: 0/0/0
Sum/Square-Sum Completion Time: 0/0
Last Good Probe Time: 0000-00-00 00:00:00.0
Lost packet ratio: 100 %
3 查找相关资料,确认NQA实例参数相关制约关系。
在配置ICMP测试例时,命令timeout、probe-count、frequency和interval之间有制约关系,具体如下:
NQA测试例发送探测报文的时间间隔interval必须大于一次探测的超时时间timeout。
自动执行测试的时间间隔frequency必须大于发送探测报文时间间隔interval*一次NQA测试发送探测报文数目probe-count。
根据制约关系,将frequency参数修改为10,问题解决。
NQA与静态路由联动是在NQA测试例检测到链路故障时(即Completion为fail时),设备才会将这条静态路由从IP路由表中删除。而Completion为no result表示该NQA测试正在进行,还没有得到结果,所以NQA联动静态路由功能失效,设备没有进行路由的切换。
调整NQA实例参数为合理值,保证测试报文丢包100%时,能够让NQA测试检测状态切换为fail状态。