Firewall (UTM) [Cisco Firepower(ASA)] How to deal with Smart Licensing [Offline/PLR]
Operation confirmation environmentFirepower 2100 seriesASA OS 9.16.xSmart Licensing Support in FirepowerFirepower also r...
Cisco
Firewall (UTM) 
Router [Cisco] Points to check when static routes are not added even if add-route is set in NAT
Operation confirmation environmentC891FJ-K9Version 15.8(3)M9"add-route" option in NATIf you specify the add-route option...
Switch [Cisco Nexus 9000] About redistribution configuration to OSPF/EIGRP
Work environmentNexsus 9300vNXOS: version 9.3(10)Redistribution configuration into OSPFTo configure redistribution to OS...
Firewall (UTM) [Cisco] Firepower(ASA) Configuration Tips
InterfaceLoopback Interface cannot be configured on ASA.FailoverIf you use one interface as Failover link and Stateful f...
Router [Cisco ASR 1002-X] How to configure static link aggregation
Consider setting static link aggregation (mode on) on your ASR 1002-X. Now if you check the options with the "channel-gr...
Switch [Cisco] Cause of starting with empty config after reboot [Catalyst 9000]
Target environmentCatalyst 9000 series switchesSymptomsEven though the startup-config is saved, the device starts up wit...
Router [Cisco] How to configure NAT [Full commentary]
Operating environmentC891FJ-K9 Version 15.8(3)M9Basic knowledge of NATInside and outside interfacesWhen configuring NAT,...
Router [Cisco] Which one should I use as the C891FJ-K9 IOS file?
Question: Which IOS should I use?If you look at the product list on Cisco's Software Download site, you can see that the...
Switch [Cisco] Smart Licensing cssm offline trouble case
Target environmentC9000 series switchesIOS-XE 17.3.2 or laterTrouble caseSymptoms: Ack import succeeds but Usage Reporti...
Router [Cisco] How to check the ios version recommended by Cisco
Need for firmware upgradeWhen dealing with Cisco equipment in a network construction project, the engineer in charge has...