I am using cisco packet tracer 7.0. I am supposed to set isis as the routing protocol. But when try to do this in config mode, the router does not identify the command "router isis". When I enter router ? the following is shown:

  Router(config)#router ?

  bgp    Border Gateway Protocol (BGP)

  eigrp  Enhanced Interior Gateway Routing Protocol (EIGRP)

  ospf   Open Shortest Path First (OSPF)

  rip    Routing Information Protocol (RIP)

There is no isis here.

Can anyone help me?

3 Answers 3


Try to issue command #ip router isis

edit: Cisco Packet Tracer doesn't support ISIS.

Cisco Packet Tracer Supported Protocols:

Application • FTP , SMTP, POP3, HTTP, TFTP, Telnet, SSH, DNS, DHCP, NTP, SNMP, AAA, ISR VOIP, SCCP config and calls ISR command support, Call Manager Express

Transport • TCP and UDP, TCP Nagle Algorithm & IP Fragmentation, RTP

Network • BGP, IPv4, ICMP, ARP, IPv6, ICMPv6, IPSec, RIPv1/ v2/ng, Multi-Area OSPF, EIGRP, Static Routing, Route Redistribution, Multilayer Switching, L3 QoS, NAT, CBAL , Zone-based policy firewall and Intrusion Protection System on the ISR, GRE VPN, IPSec VPN

Network Access/ Interface • Ethernet (802.3), 802.11, HDLC, Frame Relay, PPP, PPPoE, STP, RSTP, VTP, DTP, CDP, 802.1q, PAgP, L2 QoS, SLARP, Simple WEP, WPA, EAP


  • Hi, thanks for the reply, but it still says "invalid input"
    – netBat
    Sep 23, 2016 at 15:21
  • Cisco Packet Tracer doesn't support ISIS Sep 23, 2016 at 15:27
  • Thanks mate, think I should use something like GNS3. Thanks for your help.
    – netBat
    Sep 23, 2016 at 15:33

clear concept is that cisco packet tracer does not support isis routing protocol


As per the below link ISIS is not supported in packet tracer :


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