Step 2
|
show
interfaces
tunnel
number
[accounting]
Two routers
are configured to be endpoints of a tunnel. Device A has TenGigabit Ethernet
interface 4/1/0 configured as the source for tunnel interface 0 with an IPv4
address of 10.0.0.1 and an IPv6 prefix of 2001:0DB8:1111:2222::1/64. Device B
has TenGigabit Ethernet interface 4/1/0 configured as the source for tunnel
interface 1 with an IPv4 address of 10.0.0.2 and an IPv6 prefix of
2001:0DB8:1111:2222::2/64.
To verify
that the tunnel source and destination addresses are configured, use the
show
interfaces
tunnel command on Device A.
Example:
Device A# show interfaces tunnel 0
Tunnel0 is up, line protocol is up
Hardware is Tunnel
MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 10.0.0.1 (TenGigabitEthernet4/1/0), destination 10.0.0.2, fastswitch TTL 255
Tunnel protocol/transport GRE/IP, key disabled, sequencing disabled
Tunnel TTL 255
Checksumming of packets disabled, fast tunneling enabled
Last input 00:00:14, output 00:00:04, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
4 packets input, 352 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
8 packets output, 704 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
|
Step 3
|
ping
[protocol]
destination
To check that
the local endpoint is configured and working, use the
ping command
on Device A.
Example:
DeviceA# ping 2001:0DB8:1111:2222::2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:0DB8:1111:2222::2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/20/20 ms
|
Step 4
|
show
ip
route
[address
[mask]]
To check that
a route exists to the remote endpoint address, use the
show
ip
route command.
Example:
DeviceA# show ip route 10.0.0.2
Routing entry for 10.0.0.0/24
Known via "connected", distance 0, metric 0 (connected, via interface)
Routing Descriptor Blocks:
* directly connected, via TenGigabitEthernet4/1/0
Route metric is 0, traffic share count is 1
|
Step 5
|
ping
[protocol]
destination
To check that
the remote endpoint address is reachable, use the
ping command
on Device A.
Note
|
The
remote endpoint address may not be reachable using the
ping
command because of filtering, but the tunnel traffic may still reach its
destination.
|
Example:
DeviceA# ping 10.0.0.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/21/28 ms
To check
that the remote IPv6 tunnel endpoint is reachable, use the
ping
command again on Device A. The note regarding filtering earlier in step also
applies to this example.
Example:
DeviceA# ping 2001:0DB8:1111:2222::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 = 20/20/20 ms
These steps
may be repeated at the other endpoint of the tunnel.
|