【正文】
nnel portchannel查看生成樹信息show spanningtree show spanningtree bridgeshow spanningtree rootshow spanningtree blockedports查看HSRP狀態(tài)檢查show standby brief show standby 查看直連設(shè)備概要信息show cdp neighbor查看路由信息show ip route ospf show ip ospf database show ip ospf neighbor show ip ospf interface show ip route show ip route summary設(shè)備全部診斷信息show techsupport 故障診斷命令查看路徑信息traceroute 查看連通性信息ping repeat size顯示!!!!!,所發(fā)包全部成功 所有直連節(jié)點的時延平均值小于10ms。up,up,down,isisdown,line來檢查以太網(wǎng)口及其鏈路的狀態(tài),如下所示:protocolprotocolprotocoladministratively(3)路由器路由協(xié)議頻繁flapping故障 上聯(lián)路由器接口,若延遲過大,則表明故障原因在于傳輸線路,逐跳排查是否存在路由環(huán)路,通過cost值、前綴列表等手段解決、重啟路由器,替換測試