Cannot ping ipv6 address cisco I have stared and looked everywhere… Jul 1, 2023 · ip address 192. interface Vlan9 no shutdown management no ip redirects ip address 192. Dunno about the numeric interface identifiers, I'm used to using the name of the interface, not a number, but the OP is using MS Windows, maybe numbers are correct under MS Windows. rd 4:4. I have added it again and it pings fine. Feb 28, 2025 · ping ipv6 {ipv6-address | hostname} [size packet_size] [count packet_count] [timeout time_out] [source source-address] Parameters. Oct 29, 2024 · Link-Local addresses are not necessarily bound to the MAC address, although it is common to configure Link-Local addresses using the EUI-64 method (where the MAC address is embedded into the IPv6 address), Link-Local addresses can also be manually configured in the FE80::/10 format with the ipv6 address <address> link-local command. I'm testing ipv6 routing on a 3750. The ping is successful only if: the echo request gets to the destination, and. The Mgmt-intf VRF has been setup with a default route. ipv6 unicast routing . Apr 2, 2019 · I'm using IPV6 to configure a few routers and when trying to ping the connection to make sure everything is working the command ping ipv6 (address) produces the result of "translating (address)" An example of the address I'm using is 2001:EE:1:1::1/64, I've looked everywhere and can't figure out the issue, excuse the ignorance I'm new to this. The ipv6-prefix must be in the form documented in RFC 2373 where the address is specified in hexadecimal using 16-bit values between colons. com Translating "google. ipv6 address 2001::1/128! If you just need a "basic" ping to an IPv6 address, you can do ping 2001:db8:10::50 or ping ipv6 2001:db8:10::50 - the result is exactly the same. 88 interface are not getting an IPV6 address. 1) from anywhere but not vlan300 (10. Dec 1, 2021 · The ipv6 is enabled and also I have the updated version but still ping fails for ipv6. address-family ipv4 mvpn ! address-family ipv6 mvpn. ipv6-address—Unicast or Multicast IPv6 address to ping. 21 MB) PDF - This Chapter (1. This will automatically enable IPv6 EIGRP routing protocol on all IPv6 interfaces and allow connectivity throughout your topology. 8) [OK] Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2607:F8B0:4008:804::200E, timeout is 2 seconds: % No valid source address for Jan 28, 2020 · Working on my CCNA and studying IPV6. All pings are working except the Router to Multi switch IPv6 ping the two interfaces have the same link-local address but the IPv4 can ping the same interface, please advice. 20 cannot see/ping the switch anymore. 248. i am also using management interface. com Sep 17, 2020 · Thanks for the information that I requested. Oct 4, 2015 · Hi all, I am trying to ping my router from a PC that has an ipv6 address. 0 . 6. ipv4-address—IPv4 address to ping. The catalyst switch also has a working ipv6 route out to the internet and I've been able to successfully contact public ipv6 server addresses without issue from the switch CLI (from the switch's ipv6 gateway address on either network). 7. com"domain server (8. the interface f0/0 i have set one ipv6 ip address and my window pc also set ipv6 address but i cannot ping. 129. As Kev already pointed out, you only need to specify IPv6, if you want to do an extended ping (there are different options, you can set on an IPv4 or IPv6 ping, so the router needs to know which you Mar 31, 2020 · 6. VLAN 300 is 10. 114, timeout is 2 seconds: No route to host 172. The default value of this timeout is two seconds on Cisco routers. When testing connectivity from a Jan 13, 2022 · Ping ipv6 loopback is to test the internal IPv6 stack to ensure its configuration and functionality. Your configuration works well on the physical device. spanning-tree extend system-id! Feb 14, 2024 · Greetings, I have a PVE hypervisor, and I created one VM as the DHCP server, and I have two other clients as DHCP clients. 120. 254/24 no ipv6 redirects. 255. 1). The pc's connected through a switch. Any suggestions? I have the necessary ipv6 enable, unicast-routin Dec 29, 2023 · Compliments, I built a network with both IPv4/IPv6 the Multi switch is configured as the layer 3 router and the (Router) is the external network site. interface Vlan7 no shutdown no ip redirects ip address 192. interface Vlan8 no ip redirects no ipv6 redirects. VLAN 100 is 10. Catalog; Plans; but seems that IOS-XR can ping other IOS-XR interfaces, but can't ping the CSR1000v's. 107 interface's IPv6 IP. 192. Mar 19, 2015 · An IPv6 address prefix, in the format ipv6-prefix / prefix-length, can be used to represent bit-wise contiguous blocks of the entire address space. 251/24 no ipv6 A Destination Unreachable message SHOULD be generated by a router, or by the IPv6 layer in the originating node, in response to a packet that cannot be delivered to its destination address for reasons other than congestion. irb. Simulation Result: Apr 3, 2018 · address-family ipv4. However problem is I cannot ping default gateway from LAN. Hope this helps-David Mar 15, 2020 · Hi, When i ping from pc it says request time out. 4. i can ping from Expert mode but i cannot ping from FTD CLI or diagnostic mode. Try the example at the following address. I have ip Apr 15, 2020 · I've got a Cisco Catalyst 3850 switch setup for ipv6 unicast-routing and have two networks setup on it. 1 255. In the end I essentially decided to use /128 on loopback interfaces using globally unique IPv6 space out of a @ChrisS: no, you do include the interface spec when pinging link-local addresses. IPv6 (Internet Protocol Version 6) is the latest iteration of the Internet Protocol, succeeding IPv4. Cisco Nexus 9000 Series NX-OS Unicast Routing Configuration Guide, Release 9. show arp does confirm that the switch port is operational and has the IP address that you expect. The IPv6 ping for port G0/0/1 is OK as it is an IPv4 ping to port G0/0/0. But I cannot ping to the irb. 114 Aug 23, 2020 · Hi all, I was just checking a dhcp ip helper address concept. Apr 9, 2025 · With TCP ping, you can ping IPv4 addresses or host names, but you cannot ping IPv6 addresses. PDF - Complete Book (7. Note You can use two colons (::) only once in an IPv6 address to replace the longest string of consecutive Jun 25, 2008 · Hi. any ideas IP phones seem to register and work. The internal interface of the ISP router is configured like this : interface BVI1 ipv6 address 2A01:X IPv6 addresses contain consecutive zeros within the address. 1 assigned to vlan 300 and was able to ping it. You receive that message because in your router A you don`t have any interface activated with IPv6. Cisco Packet Tracer: Software de Simulación para Redes; 200-301 CCNA Study Materials; Aug 26, 2016 · I have been trying for days to figure this out. 240 255. Traffic is been routed to different interfaces which seems to make this staement false "link-local addresses cannot be routed between interfaces. 99. xxx!!cpp system-default!! diagnostic bootup level minimal. As we can see in the below image, getting replies from PC0 means the connection is established successfully. 23. Ok, My entire network can ping ipv4 now. One has the IP 2001:db8:1::1 and the other has IP 2001:db8:1::2. This comes from Lammle's CCNA book page 574. R5 is the hub. I think that there might be an issue with the IPv6 address itself (2001:db8:acad:A::1/64), but I am not sure. 3(x) Chapter Title. For the simulator, it is best to use "ipv6 address autoconfig" address-family ipv6 unicast autonomous-system 1 . Implement Static Routes for IPv6 Configuration Example - Cisco . > > ping 172. COBALT-RTR#sh ipv6 interface brief g4 GigabitEthernet4 [up/up] FE80::250: Sep 11, 2023 · Book Title. A network administrator can successfully ping the server at www. xxx. IPv6 NDP uses ICMPv6, so a clumsy hand with ICMPv6 ACLs May 27, 2016 · no ipv6 redirects. Here is snippe Apr 18, 2015 · down votefavorite PCs are connected to Cisco switch and up link goes to Cisco 1841 router on router LAN side interface f0/0 ip add: 2001:xx:xx:xx:1000::64/120. 114 Type escape sequence to abort. Dec 30, 2019 · I have reviewed your exercise and the IPv6 ping is successful. the same as in ipv4, but ipv4 is working fine. address-family ipv6 mvpn! neighbor 4. 107 config Apr 29, 2021 · Hi Folks, I am an IPv6 newbie and I have a problem. But I can't ping the clients from each other. Mar 31, 2024 · Thank you, ipv6 internet connectivity its now working on devices connected to my g0/0/1 interface but the devices on the vlan 88 g0/0/1. I did a p IPv6の有効化 CiscoルータでIPv6トラフィックを転送できるようにするために、以下のコマンドでIPv6を有効化します。 IPv6の有効化 (config)# ipv6 unicast-routing IPv6アドレスの設定 － グローバルユニキャストアドレス Feb 14, 2019 · Hello, I'm still a newbie in networking. I can ping public IPv6 DNS server from the Transit Router however, . I tried extend 17 votes, 34 comments. ip default-gateway 192. only issue is when i ping router it says request time out. My ISP just gave me an IPv6 block : 2A01:XXXX:1: 100::/56 I have a Cisco ASA running behind my ISP router (see the attached schema). You can use two colons (::) at the beginning, middle, or end of an IPv6 address to replace the consecutive zeros. I still cannot ping vlan 300 from other buildings. com, but cannot ping the company web server located at an ISP in another city. Is this how it meant to work, Sep 8, 2020 · Hello, I'm migrating a subnet from a router to 3750x and got a strange IPv6 issue - I can ping switch from the router but can't ping router from switch. switch 1 provision c9300-24t. We are still a bit new to IPv6 so this is getting complex to us, but we would like to leave IPv6 configured. Meet Cisco U. Jun 7, 2023 · Hello, I am attempting to ping an IPv6 address for a router's G0/0/0 port and cannot get it successfully. com ! ! ! ! ! ! ! ! ! ! ! ! interface GigabitEthernet0/0 no ip address duplex auto speed auto media-type rj45 ipv6 address 2001::1/64 ipv6 enable ! interface GigabitEthernet0/1 no ip address duplex auto speed auto media-type rj45 ipv6 address 2003::1/64 ! interface GigabitEthernet0/2 no ip address duplex auto speed auto media-type rj45 ipv6 address Oct 21, 2024 · Cannot Ping IPv6 Address: Troubleshooting Network Unreachability. ip—Use IPv4 to check the network connectivity. configuration of 2811 looks like this as well as 3750. It happens only from this router R1#ping google. Feb 13, 2021 · address-family ipv4 exit-address-family! address-family ipv6 exit-address-family! enable secret 5 enable password 7! no aaa new-model clock timezone EST -5 0 clock summer-time EDT recurring switch 1 provision ws-c3850-48u!!!!! coap http enable! call-home! If contact email address in call-home is configured as sch-smart-licensing@cisco. Table 3-1 shows a list of compressed IPv6 address formats. 0. anything i have miss out? interfa I cannot ping the router from devices on the VLAN 10 or Vlan 20 network . but I can give prefix in Windows 7 machine. All interfaces are up. I have successful eBGP IPv6 session with ISP. I can ping VLAN100 (10. Jul 31, 2021 · The one that we cannot route is the IPv6 from the outside. output of ipconfig from pc1: Eth Jun 4, 2014 · I've been setting up a new vlan but wanted to give the switch an ip address on vlan1 for now so I did: interface Vlan1 ip address 192. 1. 0 ip nat inside negotiation auto pppoe enable group global ip virtual-reassembly! interface GigabitEthernet0/0/1 ip dhcp client client-id ascii xxx ip address dhcp ip nat outside negotiation auto ipv6 address dhcp ipv6 address autoconfig ipv6 enable ipv6 nd autoconfig default-route ipv6 dhcp client request vendor I have configured an IPv6 IP to my irb. 36. I am not able to give prefix length in Windows XP. Configuring IPv6. " Oct 4, 2022 · The ping command first sends an echo request packet to an address, then waits for a reply. I can not ping across router c, so A and B can't ping D or E, and vice versa. The following characters can be displayed as output when using PING in IPv6. ipv6—Use IPv6 to check the network connectivity. I can ping anyone of these link-local addreses which are on different interfaces. It does not test reachability to any external device, nor does it confirm that IPv6 addresses are properly configured on the host. Both clients are getting their IPv6 leases successfully. Edit: Dont forget to enable ipv6 unicast-routing on all devices. I have two vlans set with a global /eui address but cannot ping a windows client attached to one of the vlans either from the router itself or another machine on the same vlan using the global address. In the attached file is the network I am working on. 2 log-adjacency-changes ! end Nov 23, 2015 · Both IPv4 and IPv6 sessions are up, but there is no connectivity via IPv6. 9. It has been assigned an IPv6 address which cannot be reached until the router itself initiates a ping. I have a router as dhcp server from another network (through WAN), it give s dhcp thorugh an ip heper address configuration on LAN succesfully. Keep in mind that a successful ICMP or TCP ping simply means that the address you are using is alive and responding to that specific type of traffic. 57 MB) Apr 17, 2015 · PCs are connected to Cisco switch and up link goes to Cisco 1841 router on router LAN side interface f0/0 ip add: 2001:xx:xx:xx:1000::64/120. Sending 5, 100-byte ICMP Echos to 172. Feb 8, 2022 · To verify that no other hosts are using the IPv6 address, the host performs the duplicate address detection (DAD) process by sending a Neighbor Solicitation (NS) message to the IPv6 address. All ip address are IPV6 and default gateway is Sep 13, 2013 · I have been doing some reading on IPv6 and have read a few different best practices guides and all of them seem to have conflicting information on the best way to assign loopback addresses. This article covers the issue of not being able to use the ping command for IPv6 addresses and how to troubleshoot network unreachability. 2. Can anyone tell me what the issue with my configs can be? The thing is I can ping from the Cisco router. First, click on PC1 and go to the command prompt, and type ping <ipv6 address> command: ping 2001:DB8:AAAA:A:20D:BDFF:FE1A:D121 . To remove all manually configured IPv6 addresses from an interface, use the no ipv6 address interface configuration command without arguments. exit-address-family ! address-family ipv6. It's a Cisco 2960 layer 2 switch. If we ping locally, everything works as it should, but we can't do it from the outside. With TCP ping, you can ping IPv4 addresses or host names, but you cannot ping IPv6 addresses. cisco. 32. next-hop-self ! vrf A. (An ICMPv6 message MUST NOT be generated if a packet is dropped due to congestion. Here is session details: Mar 2, 2012 · Hi, Firstable, know that I am a beginner in the IPv6 world. switch 2 provision c9300-24t!!ip domain name xx. I'm trying to ping IPv6 from my cloud host (running Ubuntu) to DHCP IPv6 c7200 router in GNS3, but I always got From fe80::f8ac:aaff:fe9a:a103 icmp_seq=1 Destination unreachable: Address unreachable. interface Vlan6 no shutdown no ip redirects ip address 192. When the IPv6 To remove an IPv6 address from an interface, use the no ipv6 address ipv6-prefix/prefix length eui-64 or no ipv6 address ipv6-address link-local interface configuration command. ipv6 address FE80::1 link-local ipv6 address 2001:DB8:1:1::1/64 you cannot use the main network Jul 14, 2020 · We have a Cisco ISR 4321 with the Gigabitethernet0 (management) port in a seperate VRF (Mgmt-intf). . IPv6 is not enabled. No idea how it was removed. 107 interface and it is connected to a Cisco router interface. PC is connected to switch and switch is connected to router. CPE gets prefix, address and default route from BNG, but actually cannot access internet using IPv6 while BNG can. BNG cannot ping subscriber's connected address, as well as subscriber cannot ping BNG's link local address. in IPv6 for applications using the Ping protocol, the path MTU command must be enabled Oct 29, 2015 · Thanks Jon and Unbelievable, I had 10. To diagnose basic network connectivity using IPv6 to the specified address, enter the following command: Router#ping ipv6 2001:db8::3/64. I noticed while trying to upgrade code on the 2811 and it kept failing. Are you trying to ping an IPv6 address that starts with fe80::?If so, you need to add the interface name to the IP address: ping -6 fe80::aaaa:bbbb:cccc:dddd%eth0. hi all, i try setup ipv6 lab network. I will need to look into in more detail. 4. I need help please!! If the Vlan interface takes an IPv6 address, it should This is the IPV6 part of my configs. I CAN ping no problem using the link-local. I am able to ping from IPV4 address between the routers. Yes, but only for the (directly connected) Gateway address, and that will work without proxy-arp, as the gateway address is directly connected, And there will be only 1 entry added to the arp table, as arp requests will only be sent for the gateway address, not for all target addresses. I have set it to auto config for ipv6 addressing on the PC, it has gotten an address but unable to ping to the router. One of the things that differs about IPv6 is that it uses an entirely different Layer-2 to Layer-3 mapping protocol stack, instead of ARP on Ethernet and ATMARP on ATM, etc. I can ping to other PCs which are connect to the switch and its getting reply. For some reason I cannot ping loopback address, The loopback is for a cme. Oct 23, 2013 · The four ports in this card are assigned to the same VLAN connecting to routers as these are in the same LAN subnet for IPV4 and IPV6 addressing. We have been using an ASR1001-X as our Border/Transit router successfully on IPv4 running eBGP and internally to L3 Switch using OSPF. Not including it will definitely not work. It does show that G1/0/11 is connected and is a routed port. IPv6 Ping. 50. Apr 28, 2021 · On the physical device, both "ipv6 address x:x:x:x:x" and "ipv6 address autoconfig" can make the device obtain the default route . Mircea See full list on ipcisco. xxxx. But when i try to ping IPV6 addresses among these routers, i am able to ping only between 2 routers and unable to ping between the other two. Mar 13, 2018 · i am also getting the same issue. address-family ipv4 mvpn ! address-family ipv6 mvpn ! Although the routes i can see are type 1, not type 3. Mar 31, 2025 · The IPv6 loopback address cannot be assigned to a physical interface. Which tool or command would help identify the specific router where the packet was lost or delayed? ipconfig; netstat; telnet; traceroute May 3, 2024 · Step 5: Now we have to verify the connection by pinging the IPv6 address of PC0 in PC1. At the same time I can ping link local addresses on both sides. exit-address-family! no logging console! no aaa new-model. 8. the destination is able to get an echo reply back to the source within a predetermined time called a timeout. Any help would be greatly appreciated, Oct 29, 2024 · hostname R2 ! ipv6 cef ! ipv6 unicast-routing ! ! ! interface Serial0/0 no ip address ipv6 address 2001::2/124 ipv6 ospf 1 area 0 clock rate 2000000 ! ! interface Serial0/1 no ip address ipv6 address 2002::1/124 ipv6 ospf 1 area 0 clock rate 2000000 ! ! ! ipv6 router ospf 1 router-id 10. spanning-tree mode rapid-pvst. ) Jul 27, 2012 · I have a 2811 hook up to a 3750. is there any solution for this. Results show as follows. I can also ping ipv6 anywhere except to my vlans. 168. Once I did this our monitoring server which is on a different site - ip 10. jttoeglxkasvrgngbpdhrwzopsmjvteasoqakaxmvmadxvwixwjqbrphgkcgmeocfwxlbrv