RDNet Troubleshooting
1 ping under window
(1)-t : ping specified host until stopped.
-i ttl : set ip package time to live.
under RHEL linux, -t ttl
(2)-n count : number of echo requests to send,4 as default
under RHEL linux, -c count
(3)-a : resolve address to hostnames.
under RHEL linux, aubible(听得见的)/tick ping
(4)-l size : specify size of echo request package in bytes,32 as default.
under RHEL linux,
-l preload : specify how many packages will be preloaded and not waiting for reply;
-s packagesize : specify size of data bytes to send except ICMP header data of 8 bytes,64 as default.
(5)-f : set DO NOT Fragment bit on ping package.
under RHEL linux, the option means flood ping and if not super user, usually works with -i interval option
(6)-r count : specify number of hops to be recored or displayed, 9 as maximum.
-s count : enable time report that every echo request send and reply received, 4 as maximum.
2 tracert under window
确定/追踪source-->target的路由,each entry means specific gateway ip until target as last one. 排障时,就可以根据提示信息,大致定位网路在哪一环节出现了问题。
-d : not resolve address to hostnames.
-h : maximum pops to search for target.
Note: ping is used prior to tracert
3 nslookup
name server lookup
查询DNS记录并查看域名解析是否正确
4 port mirroring(端口映射)–>wireshark
区别cisco/juniper配置
5 switch performance parameter
Duplex(双工)
full duplex
half duplex
Bandwidth
like 10Gbit/s
CPU/Memory utilization
Backplane throughput
6 firewall
stateful/stateless fw configuration
7 ipv6
冒号分16进制,共8组
2000:0000:0000:0001:0000:0000:0000:0056
2000:0:0:1::56/128
Address type
Stateless autoconfiguration(same exists in ipv4)
only fit with 64 bits mask
8 VLAN & Access/Trunk
区别于cisco/juniper
9 ip routing
static route config
区别cisco/Juniper
OSPF(链路状态路由协议)
ospf.2
ospf.3 support ipv6
特性:
***
原理‘
SPF
Configuration
区别于cisco/Juniper