Tunneling Type: Manual (ipv6ip )
Suggested Usage: Simple point-to-point tunnels that can be used within a
site or between sites.
Usage Notes: Can carry IPv6 packets only.
Tunneling Type: GRE/IPv4 (gre ip)
Suggested Usage: Simple point-to-point tunnels that can be used within a
site or between sites.
Usage Notes: Can carry IPv6, CLNS, and many other types of packets.
-- Garry L. Baker "There is no 'patch' for stupidity." - www.sqlsecurity.com On Tue, Feb 23, 2010 at 4:00 PM, Andy Reid <ccie_at_reid.it> wrote: > Thanks for your time checking this. From a traffic perspective I wonder if > there is any restrictions on an IPv6/IP tunnel over a straight GRE tunnel. > > > regards Andy > > garry baker wrote: > >> ' difference in functionality ' that i can see from a quick debug ip >> packet >> is >> >> GRE/IP = len 124, sending, proto=47 >> IPv6/IP = len 120, sending, proto=41 >> >> changing the way the tunnel is encapusaled, in size at least.... >> >> Tunnel1 is up, line protocol is up >> Hardware is Tunnel >> MTU 1514 bytes, BW 9 Kbit/sec, DLY 500000 usec, >> reliability 255/255, txload 1/255, rxload 1/255 >> Encapsulation TUNNEL, loopback not set >> Keepalive not set >> Tunnel source 1.1.1.12, destination 1.1.1.11 >> Tunnel protocol/transport GRE/IP >> >> R11#ping 3001::12 r 1 >> Type escape sequence to abort. >> Sending 1, 100-byte ICMP Echos to 3001::12, timeout is 2 seconds: >> ! >> Success rate is 100 percent (1/1), round-trip min/avg/max = 80/80/80 ms >> >> R12# >> IP: s=1.1.1.12 (Tunnel1), d=1.1.1.11 (FastEthernet0/0), len 124, sending, >> proto=47 >> >> >> >> R12#sh int tunnel 1 >> Tunnel1 is up, line protocol is up >> Hardware is Tunnel >> MTU 1514 bytes, BW 9 Kbit/sec, DLY 500000 usec, >> reliability 255/255, txload 1/255, rxload 1/255 >> Encapsulation TUNNEL, loopback not set >> Keepalive not set >> Tunnel source 1.1.1.12, destination 1.1.1.11 >> Tunnel protocol/transport IPv6/IP >> >> R11#ping 3001::12 r 1 >> Type escape sequence to abort. >> Sending 1, 100-byte ICMP Echos to 3001::12, timeout is 2 seconds: >> ! >> Success rate is 100 percent (1/1), round-trip min/avg/max = 68/68/68 ms >> >> R12# >> IP: tableid=0, s=1.1.1.11 (FastEthernet0/0), d=1.1.1.12 (FastEthernet0/0), >> routed via RIB >> IP: s=1.1.1.11 (FastEthernet0/0), d=1.1.1.12 (FastEthernet0/0), len 120, >> rcvd 3, proto=41 >> IP: s=1.1.1.12 (Tunnel1), d=1.1.1.11 (FastEthernet0/0), len 120, sending, >> proto=41 >> >> >> -- >> Garry L. Baker >> >> "There is no 'patch' for stupidity." - www.sqlsecurity.com >> >> >> On Tue, Feb 23, 2010 at 12:47 PM, Andy Reid <ccie_at_reid.it> wrote: >> >> >> >>> Hi All, >>> >>> Could someone explain to me the difference between GRE/IP and IPv6/IP >>> tunnel modes when the GRE/IP tunnel has an IPv6 address configured at >>> each >>> end. >>> >>> Both tunnel modes have an IPv4 source and destination address. The only >>> difference I can spot is in the "show int tunnel x" command where the >>> Tunnel >>> protocol/transport is shown differently. I can't spot any difference in >>> functionality at the moment. >>> >>> regards Andy >>> >>> >>> Blogs and organic groups at http://www.ccie.net >>> >>> _______________________________________________________________________ >>> Subscription information may be found at: >>> http://www.groupstudy.com/list/CCIELab.html >>> >>> >> >> >> Blogs and organic groups at http://www.ccie.net >> >> _______________________________________________________________________ >> Subscription information may be found at: >> http://www.groupstudy.com/list/CCIELab.html Blogs and organic groups at http://www.ccie.netReceived on Tue Feb 23 2010 - 17:03:12 ART
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