Hi @kkct ,   Try making these changes:   1. PC1 configuration (in vlan 10): ip address: 10.10.10.2 255.255.255.0 gateway: 10.10.10.1   2. PC2 configuration( in vlan 20) : ip address: 20.20.20.2 255.255.255.0 gateway: 20.20.20.1   3. Cisco 2960 Switch configuration: interface f0/1 switchport access vlan 10 switchport mode access   interface f0/2 switchport access vlan 20 switchport mode access   interface g0/1 switchport mode trunk   4. Cisco 2901 Router configuration: interface g0/1 no ip address  no shutdown   interface g0/1.10 encapsulation dot1q 10 ip address 10.10.10.1 255.255.255.0   interface g0/1.20 encapsulation dot1q 20 ip address 20.20.20.1 255.255.255.0   As you can see, the IP parameters of the vlan's pcs must correspond to the address configured in the subinterfaces. Also, there should not be an IP address in the physical interface, but only in the subinterfaces.   Regards   ... View more

Ola @Andre_Igor    Encryption Algorithm DES, Triple DES, MD5, AES, SHA-1   https://www.cisco.com/c/en/us/products/routers/small-business-rv-series-routers/models-comparison.html   Este guia do ano passado indica que seu modelo não suporta sha-256(sha-2)   Saudações ... View more

Hi @Dagoberto Alzamora Chacon ,   As far as I know, when sending a ping, 4 ICMP packets are sent and it verifies how many were answered and the response time (ms). In the case of traceroute, packets are sent one by one, increasing the TTL, to verify the hops that the packets is giving to the destination. In both cases, the success of the ping or traceroute can be affected by the reasons already indicated by @Julio Moisa .   Regards ... View more

Salut @Aymeric_cz  Autant que je sache, les modèles qui ont une stack sont ceux qui ont le "X". C'est peut-être pour cette raison que vous n'avez pas la possibilité de réaliser une stack entre vos appareils.   Salutations ... View more

Hola @pedro.rojas ,   Si estas trabajando en PacketTracer, te comento que he probado y el IPv6 no está soportado en los switch, tanto L2 como L3.   Saludos ... View more

Hi @Aymeric_cz ,   Check this link: https://www.cisco.com/c/en/us/support/docs/smb/switches/cisco-350x-series-stackable-managed-switches/smb5408-configure-stack-settings-on-an-sg350x-switch.html   Regards ... View more

Salut @Olipo,   Vérifiez ce que ce guide indique: Frame Relay Encapsulation When Frame Relay encapsulation is enabled on a serial interface, the interface configuration is hierarchical and comprises the following elements: The serial main interface comprises the physical interface and port. If you are not using the serial interface to support Cisco HDLC and PPP encapsulated connections, then you must configure subinterfaces with permanent virtual circuits (PVCs) under the serial main interface. Frame Relay connections are supported on PVCs only. Serial subinterfaces are configured under the serial main interface. A serial subinterface does not actively carry traffic until you configure a PVC under the serial subinterface. Layer 3 configuration typically takes place on the subinterface. When the encapsulation on a serial interface is changed from HDLC to any other encapsulation type, the configured serial subinterfaces on the main interface inherit the newly changed encapsulation and they do not get deleted. Point-to-point PVCs are configured under a serial subinterface. You cannot configure a PVC directly under a main interface. A single point-to-point PVC is allowed per subinterface. PVCs use a predefined circuit path and fail if the path is interrupted. PVCs remain active until the circuit is removed from either configuration. Connections on the serial PVC support Frame Relay encapsulation only. https://www.cisco.com/c/en/us/td/docs/routers/access/800M/software/800MSCG/serconf.html   Salutations     ... View more

Hi @dsobrinho ,   Queries: What model of switch are you using? Could you tell me if the power efficient-ethernet is enabled in the indicated interface? This function comes by default in some switch models, could you try to disable it, if it is the case?   Regards   ... View more

Hi @Amafsha1 ,   I know that the ip route command puts me under the default route for a gateway that does not exist anymore and I must point the default route now to 192.168.120.1.     That's right. Without more details of your network. I suggest you see the effect of this and be aware of possible complications.   Regards   ... View more

Hi @Saurabh.s ,   I tell you that there is an event in the community in Spanish about WLC: https://community.cisco.com/t5/eventos-wireless-mobility/pregunte-al-experto-evento-mejores-pr%C3%A1cticas-y-tips-para/ba-p/3848125 I know that the expert could help you in English, if you need it. Regards ... View more

Hola @yesica ,   Por mientras, te dejo este link con las capacidades soportadas: https://www.cisco.com/c/en/us/products/collateral/routers/1800-series-integrated-services-routers-isr/product_bulletin_c25_515323.html   Saludos ... View more

Hi @DenkenGeist IT ,   Have you tried to connect through the console cable? If you can access the switch in that way, you could create a user and try to enter the GUI with those credentials.   Regards ... View more