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Pinging IPV6 between Windows XP and Cisco Router

Hi Group,

I am trying to do very simple thing but it is the first time I am doing it,

I assigned my fastethernet 0/0 an ipv6 address of

2001:DB8:1234:42::1/64

Also I assigned My Windows XP manually an IPV6 of 2001:db8:1234:42::2

then I tryed to ping from the router :

Rack1R3#ping 2001:db8:1234:42::2

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2001:DB8:1234:42::2, timeout is 2 seconds: ..... Success rate is 0 percent (0/5)

I will appreciate if you can tell me where is my mistake, why it is not pinging !

here is the configuration on Windows XP and the router

netsh interface ipv6 add address "Local Area Connection"

2001:DB8:1234:42::2

c:>ipconfig

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 192.168.10.200 Subnet Mask . . . . . . . . . . . : 255.255.255.0 IP Address. . . . . . . . . . . . : 2001:db8:1234:42::2 IP Address. . . . . . . . . . . . : fe80::212:3fff:fed1:5985%5 Default Gateway . . . . . . . . . :

Rack1R3#sho run int fas0/0 Building configuration...

Current configuration : 220 bytes ! interface FastEthernet0/0 description Access link down to customers ip address 192.168.10.1 255.255.255.0 no ip mroute-cache duplex auto speed auto ipv6 address 2001:DB8:1234:42::1/64 ipv6 enable ipv6 nat end

Conceptzone

Reply to
ConceptZone
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You need to set up an netmask, too.

. ipv6 nd prefix 2001:db8:1234:42::/64 enables autoconfiguration for the clients. This is the way an IPv6 network is set up.

Futhermore, you should not assign the address by hand, use the default mechanism for this: . ipv6 address 2001:DB8:1234:42::/64 eui-64

And do not enven consider nat. This time is over.

Reply to
Lutz Donnerhacke
  1. I assume that you have confirmed conectivity between the router and the PC by pinging the IPv4 address of the Windows PC ?

  1. Is there a firewall enabled on the Windows PC ?

  2. From the router after you ping the global IP address assigned to the windows PC, what does the output of "sh ipv6 nei fa 0/0" display - there should be at least two entries one for the windows PC IPv6 link-local address and one for its IPv6 globaladdress

  1. can you ping the IPv6 link-local address of the Windows PC ?

post your findings

Reply to
Merv

Okay, Thanks for your reply,

I have done what you told me , but now how can I determin what ipv6 address my windows XP took ?

should I do some thing extra on my windows XP to enable the autoconfiguration ?

here is the configuration of the router :

interface FastEthernet0/0 description Access link down to customers ip address 192.168.10.1 255.255.255.0 no ip mroute-cache duplex auto speed auto ipv6 address 2001:DB8:1234:42::/64 eui-64 ipv6 enable ipv6 nd prefix 2001:DB8:1234:42::/64 end

and I made sure that nd is going out fastethernet 0/0 :

ICMPv6-ND: Sending NS for FE80::20F:90FF:FE6E:81E0 on FastEthernet0/0 ICMPv6-ND: DAD: FE80::20F:90FF:FE6E:81E0 is unique. ICMPv6-ND: Sending NS for 2001:DB8:1234:42:20F:90FF:FE6E:81E0 on FastEthernet0/0 ICMPv6-ND: Sending NA for FE80::20F:90FF:FE6E:81E0 on FastEthernet0/0 ICMPv6-ND: DAD: 2001:DB8:1234:42:20F:90FF:FE6E:81E0 is unique. ICMPv6-ND: Sending NA for 2001:DB8:1234:42:20F:90FF:FE6E:81E0 on FastEthernet0/0

Reply to
ConceptZone

Ya sure I can ping my machine IP address which is 192.168.1.200

Rack1R3#ping 192.168.10.200

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.10.200, timeout is 2 seconds: !!!!!

and the link local address of the fas0/0 is FE80::20F:90FF:FE6E:81E0

now as you noticed I chaned it to nd instead of assgning ipv6 mannually to the XP, should I go back and assign it manually ?

beside this , there is no output from the show ipv6 neighbors,

Rack1R3#show ipv6 neighbors Rack1R3#

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 192.168.10.200 Subnet Mask . . . . . . . . . . . : 255.255.255.0 IP Address. . . . . . . . . . . . : fe80::212:3fff:fed1:5985%5 Default Gateway . . . . . . . . . :

Rack1R3#show ipv6 int fas0/0 FastEthernet0/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::20F:90FF:FE6E:81E0 Description: Access link down to customers Global unicast address(es): 2001:DB8:1234:42:20F:90FF:FE6E:81E0, subnet is

2001:DB8:1234:42::/64 Joined group address(es): FF02::1 FF02::2 FF02::1:FF6E:81E0 MTU is 1500 bytes ICMP error messages limited to one every 100 milliseconds ICMP redirects are enabled ND DAD is enabled, number of DAD attempts: 1 ND reachable time is 30000 milliseconds ND advertised reachable time is 0 milliseconds ND advertised retransmit interval is 0 milliseconds ND router advertisements are sent every 200 seconds ND router advertisements live for 1800 seconds Hosts use stateless autoconfig for addresses.
Reply to
ConceptZone

yes assign in manually on your Windows PC

not good - until ND is successful ping will fail - same as ARP failure for IPv4

after you change back to manul IPv6 address on PC, turn of "debug ipv6 nd" to seee what or what is not occuring.

install Ethereal on PC to be able to capture packet from router to see what is actually being received and transmitted

Reply to
Merv

I can see the ipv6 address of windows XP listed under "show ipv6 neighbor" but when Itried to ping it , it did not reply :

Rack1R3#show ipv6 neighbors IPv6 Address Age Link-layer Addr State Interface FE80::212:3FFF:FED1:5985 0 0012.3fd1.5985 REACH Fa0/0

Rack1R3#debug ipv6 packet detail

Rack1R3#ping FE80::212:3FFF:FED1:5985 Output Interface: fastethernet0/0 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to FE80::212:3FFF:FED1:5985, timeout is

2 seconds:

IPv6: SAS picked source FE80::20F:90FF:FE6E:81E0 for FE80::212:3FFF:FED1:5985 (FastEthernet0/0) IPV6: source FE80::20F:90FF:FE6E:81E0 (local) dest FE80::212:3FFF:FED1:5985 (FastEthernet0/0) traffic class 0, flow 0x0, len 100+0, prot 58, hops 64, originating IPv6: Sending on FastEthernet0/0.

Reply to
ConceptZone

what is in the IPv6 neighbor cache on the winodws PC - use command "ipv6 nc"

Reply to
Merv

you might want to try shorter addresses for testing purposes - like

1::1/64 and 1::2/64
Reply to
Merv

or DEAD:BEEF::1/64 and::2/64

Reply to
Merv

Okay, I abbreviated the addresses to 1::1 for the router and 1::2 for the XP, here is the config of XP:

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 192.168.10.200 Subnet Mask . . . . . . . . . . . : 255.255.255.0 IP Address. . . . . . . . . . . . : 1::2 IP Address. . . . . . . . . . . . : fe80::212:3fff:fed1:5985%5 Default Gateway . . . . . . . . . :

and here is the config of the router again (I removed the nd because we are doing it manually now):

interface FastEthernet0/0 description Access link down to customers ip address 192.168.10.1 255.255.255.0 no ip mroute-cache duplex auto speed auto ipv6 address 1::1/64 ipv6 enable end

Here is the output from EtherPeek NX: ,

Packet Info Flags: 0x00 Status: 0x00 Packet Length: 90 Timestamp: 13:06:30.238618 08/24/2006 Ethernet Header Destination: 33:33:FF:00:00:02 Source: 00:0F:90:6E:81:E0 Protocol Type: 0x86DD IPv6 IP Version 6 Header - Internet Protocol Datagram Version: 6 Priority: 14 Non-congestion-controlled Traffic Flow Label: 0x000000 Payload Length: 32 Next Header: 0x3A ICMPv6 - Internet Control Message Protocol for IPv6 Hop Limit: 255 Source Address: 0001:0000:0000:0000:0000:0000:0000:0001 Destination Address: FF02:0000:0000:0000:0000:0001:FF00:0002 ICMPv6 - Internet Control Messages Protocol Version 6 ICMP Type: 135 Neighbor Solicitation Code: 0 Checksum: 0x673A Reserved: 0x00000000 Target Address: 0001:0000:0000:0000:0000:0000:0000:0002 Source Link-Layer Address Option Type: 1 Source Link-Layer Address Option Length: 1 Source Address: 00:0F:90:6E:81:E0

FCS - Frame Check Sequence FCS (Calculated): 0x37D08B8E

and here is the output of "ipvc nc" from the XP :

C:\\>ipv6 nc

7: fe80::5445:5245:444f 0.0.0.0:0 permanent 6: fe80::212:f0ff:fe76:8a9f 00-12-f0-76-8a-9f permanent 6: 2001:2::1 incomplete (unreachable) 6: 2001:2::11 incomplete (unreachable) 6: 2001:2::16 incomplete (unreachable) 6: 2001:192:168:1::1 incomplete (unreachable) 6: 2001:db8:1234:42:20f:90ff:fe6e:81e0 incomplete (unreachable ) 6: 2001:db8:1234:42::1 incomplete (unreachable) 6: 1::1 incomplete (unreachable) 5: 2001:db8:1234:42::5 incomplete 5: 2001:db8:1234:42:20f:90ff:fe6e:81e1 incomplete 5: fe80::212:3fff:fed1:5985 00-12-3f-d1-59-85 permanent 5: 2001:192:168:1::2 incomplete 5: fe80::2 incomplete 5: 2001:2::10 incomplete 5: fe80::20f:90ff:fe6e:81e0 00-0f-90-6e-81-e0 stale 5: 1::2 00-12-3f-d1-59-85 permanent 4: fe80::210:c6ff:fe87:98c4 incomplete 3: 2002:8201:1a0a::8201:1a0a 130.1.26.10 permanent 3: 2002:c058:6301::c058:6301 192.88.99.1 permanent 2: fe80::5efe:192.168.1.65 127.0.0.1 permanent 2: fe80::5efe:192.168.1.200 192.168.1.200 permanent 2: fe80::5efe:192.168.10.200 127.0.0.1 permanent 1: fe80::1 permanent 1: ::1 permanent
Reply to
ConceptZone

the packet is sourcing from 00:0F:90:6E:81:E0 ?

this is my link-local address of the fastethernet 0/0 of my router

link-local address is FE80::20F:90FF:FE6E:81E0

The EtherPeek NX excerpt 00:0F:90:6E:81:E0 without prefixing FE80

FE80::20F:90FF:FE6E:81E0

what does this mean? does it mean that router should source the link local address with the same subnet of the link local address of XP ?

what about the 33:33:FF:00:00:02 in the destination of the Ethernet header? is the router expecting to see this address on my windows XP machine ?

how this address was generated ?

I think I am lost

Reply to
ConceptZone

the etherpeek trace shows that the router is sending a neighbor solicitation (NS ) and it looks like the PC is not sending a response

flush the cache on Windows and try again - "ipv6 ncf"

also what is the contents of the PC route cache - ipv6 rc

Please confirm that the Windows firewall feature is not enabled or any other PC firewall enabled.

Reply to
Merv
  1. what service packs have been applied to the Windows PC

  1. post the output of show version from the rotuer

Reply to
Merv

Service Pack 2

and here is the show version of the router

Rack1R3#show version Cisco Internetwork Operating System Software IOS (tm) C2600 Software (C2600-JS-M), Version 12.2(15)T17, RELEASE SOFTWARE (fc1) Technical Support:

formatting link
(c) 1986-2005 by cisco Systems, Inc. Compiled Fri 12-Aug-05 15:49 by kehsiao Image text-base: 0x80008098, data-base: 0x81D1B940

ROM: System Bootstrap, Version 12.2(8r) [cmong 8r], RELEASE SOFTWARE (fc1) ROM: C2600 Software (C2600-JS-M), Version 12.2(15)T17, RELEASE SOFTWARE (fc1)

Rack1R3 uptime is 16 hours, 28 minutes System returned to ROM by power-on System image file is "flash:c2600-js-mz.122-15.T17.bin"

cisco 2621XM (MPC860P) processor (revision 0x300) with 93184K/5120K bytes of memory. Processor board ID JAE0813A4JB (428529633) M860 processor: part number 5, mask 2 Bridging software. X.25 software, Version 3.0.0. SuperLAT software (copyright 1990 by Meridian Technology Corp). TN3270 Emulation software.

Reply to
ConceptZone

Guys :

I am sure it is a very basic issue, but it is just because I did not try it before, and this is my first time to try playing with IPV6

MY MACHINE : 1::2 THE ROUTER : 1::1/64

Let me break down the results from the EtherPeek NX:

Target Address: 0001:0000:0000:0000:0000:0000:0000:0002

and the source address is :

Source Address: 0001:0000:0000:0000:0000:0000:0000:0001

but in the Ethernet Header the source is :

00:0F:90:6E:81:E0

and the destination in the Ethernet Header is :

33:33:FF:00:00:02

Now I am doubting with the destination in the Ethernet header which is

33:33:FF:00:00:02

Why The destination address of the Ethernet Header is this address?

By the way, I do not think it is a router version issue, I tried it on another router with the same results. I am missing something and I really need your help

Sorry for my lack of IPV6 concepts

Reply to
ConceptZone

I set this up on my 2600 and it works.

Using XP SP2 and 2600 with 12.3(12a)

HUB#ping 1::2

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1::2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

HUB#sh ipv6 nei IPv6 Address Age Link-layer Addr State Interface

1::2 0 0008.749f.d08b REACH Fa1/0

HUB#sh run int fa 1/0 Building configuration...

Current configuration : 95 bytes ! interface FastEthernet1/0 no ip address duplex auto speed auto ipv6 address 1::1/64 end

HUB#sh ver Cisco Internetwork Operating System Software IOS (tm) C2600 Software (C2600-IK9O3S3-M), Version 12.3(12a), RELEASE SOFTWARE ( fc2) Technical Support:

formatting link
(c) 1986-2005 by cisco Systems, Inc. Compiled Thu 13-Jan-05 18:06 by kellythw Image text-base: 0x80008098, data-base: 0x819FA39C

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1) ROM: C2600 Software (C2600-IK9O3S3-M), Version 12.3(12a), RELEASE SOFTWARE (fc2)

HUB uptime is 32 minutes System returned to ROM by power-on System image file is "flash:c2600-ik9o3s3-mz.123-12a.bin"

Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1985-2001 Microsoft Corp.

C:\\>netsh interface ipv6 add address "Local Ethernet" 1::2 Ok.

C:\\>

C:\\>

C:\\>netsh interface ipv6 show interface Querying active state...

Idx Met MTU State Name

--- ---- ----- ------------ ----- 5 0 1500 Connected Local Ethernet 4 2 1280 Disconnected Teredo Tunneling Pseudo-Interface 3 1 1280 Connected 6to4 Pseudo-Interface 2 1 1280 Connected Automatic Tunneling Pseudo-Interface 1 0 1500 Connected Loopback Pseudo-Interface

C:\\>ipv6 rc ::1 via 1/::1 (stale) src 1/::1 PMTU 1500

C:\\>ipv6 nc

5: 1::1 00-b0-64-4c-e5-50 stale 5: fe80::201:96ff:fee0:6e30 incomplete 5: fe80::208:74ff:fe9f:d08b 00-08-74-9f-d0-8b permanent 5: 1::2 00-08-74-9f-d0-8b permanent 5: fe80::2b0:64ff:fe4c:e550 00-b0-64-4c-e5-50 stale 4: fe80::5445:5245:444f 0.0.0.0:0 permanent 2: fe80::5efe:192.168.1.2 192.168.1.2 permanent 2: fe80::5efe:169.254.134.9 127.0.0.1 permanent 1: ::1 permanent 1: fe80::1 permanent

Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1985-2001 Microsoft Corp.

C:\\>netsh interface ipv6 add address "Local Ethernet" 1::2 Ok.

C:\\>

C:\\>

C:\\>netsh interface ipv6 show interface Querying active state...

Idx Met MTU State Name

--- ---- ----- ------------ ----- 5 0 1500 Connected Local Ethernet 4 2 1280 Disconnected Teredo Tunneling Pseudo-Interface 3 1 1280 Connected 6to4 Pseudo-Interface 2 1 1280 Connected Automatic Tunneling Pseudo-Interface 1 0 1500 Connected Loopback Pseudo-Interface

C:\\>ipv6 rc ::1 via 1/::1 (stale) src 1/::1 PMTU 1500

C:\\>ipv6 nc

5: 1::1 00-b0-64-4c-e5-50 stale 5: fe80::201:96ff:fee0:6e30 incomplete 5: fe80::208:74ff:fe9f:d08b 00-08-74-9f-d0-8b permanent 5: 1::2 00-08-74-9f-d0-8b permanent 5: fe80::2b0:64ff:fe4c:e550 00-b0-64-4c-e5-50 stale 4: fe80::5445:5245:444f 0.0.0.0:0 permanent 2: fe80::5efe:192.168.1.2 192.168.1.2 permanent 2: fe80::5efe:169.254.134.9 127.0.0.1 permanent 1: ::1 permanent 1: fe80::1 permanent

C:\\>ipv6 rc

1::1 via 5/1::1 src 5/1::2 PMTU 1500 161 seconds since ICMP error fe80::201:96ff:fee0:6e30 via 5/fe80::201:96ff:fee0:6e30 (stale) (zone-specific) src 5/fe80::208:74ff:fe9f:d08b PMTU 1500 257 seconds since ICMP error ::1 via 1/::1 (stale) src 1/::1 PMTU 1500
Reply to
Merv

These are the Windows command that I used in cmd window

ipv6 ncf

netsh interface ipv6 add address "Local Ethernet" 1::2

netsh interface ipv6 show interface

ipv6 nc

ipv6 rc

Get the interface name to use between the quotes by looking at name show in the output of ipconfig /all

Reply to
Merv

Merv,

Can you imagin that it is working now , here is what happened :

luckily My windows XP gave me a very cool Blue Screen , and the windows restarted.

then I went again to check the connectivity and I am able to ping now !

Rack1R3#show ipv6 neighbors IPv6 Address Age Link-layer Addr State Interface

1::2 0 0012.3fd1.5985 REACH Fa0/0 FE80::212:3FFF:FED1:5985 104 0012.3fd1.5985 STALE Fa0/0

Rack1R3#ping 1::2

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 1::2, timeout is 2 seconds: !!!!!

I wondered like why every thing is okay now while before not, so I recaptured the traffic and I am going to list the result from NX Peek software :

IP Version 6 Header - Internet Protocol Datagram :

-----------------------------------------------------------------------

Source Address: 0001:0000:0000:0000:0000:0000:0000:0001 Destination Address: 0001:0000:0000:0000:0000:0000:0000:0002

Ethernet Header :

-------------------------

Destination: 00:12:3F:D1:59:85 Source: 00:0F:90:6E:81:E0

Notice the 00:12:3F:D1:59:85 in the destination of the ethernet header , this is the link local address of the WINDOWS XP

before this address was 33:33:FF:00:00:02

Reply to
ConceptZone

this is the link local address of the WINDOWS XP

NS requests can be multicast and unicast.

The above address is an IPv6 multicast MAC address

In IPv4 ARP requests are sent to broadcast MAC address

In IPv6 there is no broadcast address and no broadcast MAC address

so to send NS multicast a multicast MAC address is used

IPv6 multicast address Description FF02::1 The all-nodes address used to reach all nodes on the same link.

FF02::2 The all-routers address used to reach all routers on the same link.

so the multicast MAC address used to send to IPv6 multicast address FF02::2 is 33:33:00:00:00:02

I do not know why windows would try to use a multicat MAC address of

33:33:FF:00:00:02. If it is try to send out a router solication I would have thought it should use 33:33:00:00:00:02

There is a new OUI format for IPv6 Multicast. The leading two bytes are set to 33:33, while the following 4 bytes/32bits are available for address mapping from the last 32 bits of the 128 bit Multicast address.

According to this model, all routers would have the following address:

33:33:xx:xx:xx:xx: where X is the last 32 bits of the address

33:33:00:00:00:02

Reply to
Merv

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