On 05/17/11 04:25, JB wrote: > Tom H<tomh0665<at> gmail.com> writes: > >> ... >>> Let's try a ping from Fedora to Powerbook. >>> >>> snip >>> >>> But, the situation is curious, because we have ping's IPv4-format packet with >>> FROM IPv4 address and TO IPv4 address going out thru IPv6-type interface >> If you're referring to "192.168.1.254 0:1d:5a:c8:91:c1" as "FROM IPv4 >> address and TO IPv4 address going out thru IPv6-type interface" then >> no. "0:1d:5a:c8:91:c1" is the MAC address of "192.168.1.254". > No, I was referring to Fedora-to-Powerbook comm, but from the point of view of > Fedora machine, in that paragraph: >> Let's try a ping from Fedora to Powerbook. >> ... > When I mentioned IPv6 in context of Fedora-to-Powerbook comm, I meant this > output. > > On Fedora Machine: > # /sbin/ifconfig > ... > wlan0 Link encap:Ethernet HWaddr 00:34:56:00:03:43 > inet6 addr: fe80::234:56ff:fe00:343/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > ... > wlan0:0 Link encap:Ethernet HWaddr 00:34:56:00:03:43 > inet addr:192.168.1.108 Bcast:192.168.1.255 Mask:255.255.255.0 > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > > For wlan0, this line shows an IPv6 link-local address (valid within the local > subnetwork !): > inet6 addr: fe80::234:56ff:fe00:343/64 Scope:Link > It is UP and RUNNING, and so ready for communication on IPv6 and link layers. > > It is a valid IPv6 interface. > The fact that IPv6 layer was disabled on the subnet (as JD clarified it later), > does not change anything. Once again, the type of configured interface wlan0 > is of interest to me, that is IPv6-type. > > Because wlan0 (not wlan0:0) does not have an IPv4 address assigned, I became > suspicious of what that means when wlan0 was utilized in Fedora's routing > table: > > # /bin/netstat -rn > Kernel IP routing table > Destination Gateway Genmask Flags MSS Window irtt > Iface > ... > 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 > wlan0 > ... > 0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 > wlan0 > > That was the reason I analyzed the IPv4 packet flow between Fedora and > Powerbook with "curiosity" with regard to wlan (IPv6-type interface) and > wlan0:0 (IPv4-type interface). > > I am still not 100% clear what the implication of it is, so I would welcome > any authoritative comment(s) on this matter. > > JB > > ifconfig always prints a ipv6 address for an interface. TO see the IP address you specify <iface>:0 -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
