can't reach host with ipv6


 
Thread Tools Search this Thread
Special Forums IP Networking can't reach host with ipv6
# 1  
Old 05-22-2009
can't reach host with ipv6

Hi all,

First I know little about ipv6.
I have two target. A and B,A and B connet with each other *directly* with line.and I can ping each other with ipv4

For A:
PHP Code:
[root@localhost leilyang]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:21:9B:80:51:68
          inet addr
:128.224.159.188  Bcast:128.224.159.255  Mask:255.255.254.0
          inet6 addr
fe80::221:9bff:fe80:5168/64 Scope:Link
          inet6 addr
2002:1::10/64 Scope:Global
          
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets
:4115311 errors:0 dropped:0 overruns:0 frame:0
          TX packets
:2408411 errors:0 dropped:0 overruns:0 carrier:0
          collisions
:0 txqueuelen:100
          RX bytes
:936528667 (893.1 MiB)  TX bytes:464660931 (443.1 MiB)
          
Memory:fe9e0000-fea00000

lo        Link encap
:Local Loopback
          inet addr
:127.0.0.1  Mask:255.0.0.0
          inet6 addr
: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU
:16436  Metric:1
          RX packets
:121667 errors:0 dropped:0 overruns:0 frame:0
          TX packets
:121667 errors:0 dropped:0 overruns:0 carrier:0
          collisions
:0 txqueuelen:0
          RX bytes
:15175375 (14.4 MiB)  TX bytes:15175375 (14.4 Mi 
For B:
PHP Code:
root@localhost:/netperf_imagelsmod
Module                  Size  Used by
binfmt_misc            11872  1 
ipv6                  348912  38 

root
@localhost:/netperf_imageifconfig
eth0      Link encap
:Ethernet  HWaddr 00:0F:B7:10:34:0E  
          inet addr
:100.0.0.10  Bcast:100.255.255.255  Mask:255.0.0.0
          inet6 addr
2002:1::2/64 Scope:Global
          
inet6 addrfe80::20f:b7ff:fe10:340e/64 Scope:Link
          UP BROADCAST MULTICAST  MTU
:1500  Metric:1
          RX packets
:20807444 errors:0 dropped:0 overruns:0 frame:0
          TX packets
:33797349 errors:0 dropped:0 overruns:0 carrier:0
          collisions
:0 txqueuelen:1000 
          RX bytes
:4221376854 (3.9 GiB)  TX bytes:38935450650 (36.2 GiB)

lo        Link encap:Local Loopback  
          inet addr
:127.0.0.1  Mask:255.0.0.0
          inet6 addr
: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU
:16436  Metric:1
          RX packets
:1676 errors:0 dropped:0 overruns:0 frame:0
          TX packets
:1676 errors:0 dropped:0 overruns:0 carrier:0
          collisions
:0 txqueuelen:
          RX bytes
:206456 (201.6 KiB)  TX bytes:206456 (201.6 KiB
On the A , I ping6 2002:1::2, but fail to ping.

On the B. I run
PHP Code:
root@localhost:/netperf_imagetcpdump -n ip6
tcpdump
verbose output suppressed, use -or -vv for full protocol decode
listening on eth0
link-type EN10MB (Ethernet), capture size 96 bytes
02
:15:01.274586 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:03.274684 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:04.274269 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:05.273853 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:07.274028 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:08.273606 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:09.273191 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:11.273365 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:12.272943 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:13.272529 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:15.272703 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32
02
:15:16.273286 IP6 2002:1::10 ff02::1:ff00:2ICMP6neighbor solicitationwho has 2002:1::2length 32 
Thanks for your time

Last edited by yanglei_fage; 05-22-2009 at 06:44 AM..
# 2  
Old 06-19-2009
Issue whit the local link

Hello i think you may have an issue whit your local link, the ipv6 use a different concept on the multicast or broadcast, and to reach the local link layer you need to add an specific ip address, I think you can find your answer here, Supporting IPv6 on a Linux Server Node you can find the correct local link.
Login or Register to Ask a Question

Previous Thread | Next Thread

8 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Assigning ipv6 to bonding interface - getting old as well as changed ipv6 in ifconfig output

Hi, I have created a bonding bond1 interface with 6 Eth , mode=4. Recently i have changed my old ipv6 to new one and tried to restart as well as reload network service. Post which i can see old as well as changed ipv6 in ifconfig command output. Below are few files and command output for your... (1 Reply)
Discussion started by: omkar.jadhav
1 Replies

2. Post Here to Contact Site Administrators and Moderators

Trying to reach Neo, but unable to.

Hello, I am trying to reach forum administrator Neo because of specific material that he posted here. I cannot reach him directly via PM him unless I have made 10 posts, but at the same time I don't want to spam the forum with 10 posts just to be able to PM him. I assume I won't be able to... (3 Replies)
Discussion started by: Artashes
3 Replies

3. Shell Programming and Scripting

Help with script to reach remote servers

new3=`cat /tmp/list3` for pol in "$new3" $(su - dbadmin -c "ssh $new3 '/usr//llist'"); do export policy=`echo $pol`; su - dbadmin -c "ssh $x '/usr/policycmd $policy -L |grep -i active; echo $policy'">>/tmp/listxyz;done I am having trouble with this testscript as the file list3 has two names... (1 Reply)
Discussion started by: newbie2010
1 Replies

4. Infrastructure Monitoring

How to setup Email notification when storage reach certain % ?

Hi, I recently research on how auto-mailing to notify the increase of storage size. I try avoid schedule/routine checkup the storage to determine increase the storage size. It is time-consuming. Any comment on how to get the storage size %? and automatically trigger mailing function instead... (16 Replies)
Discussion started by: i-counsellor
16 Replies

5. UNIX for Advanced & Expert Users

Help! How to find the local host after few ssh hops to remote host???

I do a ssh to remote host(A1) from local host(L1). I then ssh to another remote(A2) from A1. When I do a who -m from A2, I see the "connected from" as "A1". => who -m userid pts/2 2010-03-27 08:47 (A1) I want to identify who is the local host who initiated the connection to... (3 Replies)
Discussion started by: gomes1333
3 Replies

6. BSD

How to reach files from tape drive using dd

Hi all! I have problem with copying files from tape drive. The contents of tape: silverman# tcopy /dev/sa1 file 0: block size 10240: 21 records file 0: eof after 21 records: 215040 bytes file 1: block size 10240: 20712 records file 1: eof after 20712 records: 212090880 bytes file 2:... (2 Replies)
Discussion started by: d3m00n
2 Replies

7. UNIX for Dummies Questions & Answers

How to reach to the end of the file?

What is the command, which takes cursor to the end of file which is opened within vi editor? (4 Replies)
Discussion started by: videsh77
4 Replies

8. IP Networking

QNX host cannot ping SCO host, vice versa

The problem I am facing now is that the QNX host could not ping the SCO host and vice versa. They are in the same domain, ie, 172.20.3.xx. As I am very new to Unix, I guess I must have missed out some important steps. Pls help... Thanx alot (2 Replies)
Discussion started by: gavon
2 Replies
Login or Register to Ask a Question