Description
Learning Objectives:
-
Perform basic IPv6 configurations on a Desktop and Router.
-
Distinguish between IPv4 and IPv6 addresses
-
Configure IPv6 static routes in Router
-
Observe traffic flow using IPv6 static routes.
-
IPv6 neighbor cache entries
-
Understanding IPv6 Link Local Address
-
Working with ping6 and tracepath6
LAB Network Topology:
4. Configure IPv6 interfaces in Router-1
* Configure IPv6 global address 2001::01/64 to interface if-port-1
operational> configure
Entering configuration mode with exclusive access.
configure> modify parameter-group interface if-port-1
Info: Parameter group instance loaded for modification.
configure> default ip ipv4
configure> enter ip ipv6
[ interface:”if-port-1″ > ip > ipv6 ]
configure> show draft -e
[ interface:”if-port-1″ > ip > ipv6 ]
enable no
address 0000:0000:0000:0000:0000:0000:0000:0000
netmask 0000:0000:0000:0000:0000:0000:0000:0000
peer-address 0000:0000:0000:0000:0000:0000:0000:0000
peer-netmask 0000:0000:0000:0000:0000:0000:0000:0000
link-local-address 0000:0000:0000:0000:0000:0000:0000:0000
link-local-netmask 0000:0000:0000:0000:0000:0000:0000:0000
preference 1
metric 1
ndp {
cache-timeout 1200
unsolicited-learning enable
}
vrrp {
enable no
virtual-router [+] {
}
}
configure> set enable yes
configure> set address 2001::01/64
configure> save
Info: Parameter group interface “if-port-1” saved configure>
* Configure IPv6 global address 2002::01/64 to interface if-port-2
configure> modify parameter-group interface if-port-2 Info: Parameter group instance loaded for modification. configure> default ip ipv4
configure> set ip ipv6 enable yes configure> set ip ipv6 address 2002::01/64 configure> save
Info: Parameter group interface “if-port-2” saved configure> exit
* Verify Interface configurations
operational> show interface all
Interface name Status Encaps- IP address
ulation
——————————————————————————
if-port-1 up ethernet 2001::1/64
fe80::226:f7ff:fe00:6d/64
Page 3/10
|
if-port-2 |
up |
ethernet |
2002::1/64 |
|
fe80::226:f7ff:fe00:6e/64 |
|||
|
if-port-3 |
down |
ethernet |
– |
|
if-port-4 |
down |
ethernet |
– |
|
if-port-5 |
down |
ethernet |
– |
|
if-port-6 |
down |
ethernet |
– |
|
if-port-7 |
down |
ethernet |
– |
|
if-port-8 |
down |
ethernet |
– |
|
management |
disabled |
ethernet |
10.0.0.12/24 |
Total number of interfaces displayed : 9
operational>
Check IPv6 information in “show interface details” command output
operational> show interface details if-port-1 if-port-2
5. Configure IPv6 static routes in Router-1
* Configure a static route to reach 2003:00/64 network (Bob) with gateway as 2002::02( Router-2)
operational> configure
Entering configuration mode with exclusive access. configure> create parameter-group ip-route v6-route-2003-nw Info: Parameter group instance created. configure> show draft -e
[ ip-route:”v6-route-2003-nw” ]
*name “v6-route-2003-nw”
enable no
router “”
destination 0.0.0.0
netmask 0.0.0.0
next-hop {
router “”
gateway 0.0.0.0
label-switched-path “”
}
preference 30
metric 2
configure> set enable yes
configure> set router data
configure> set destination 2003::/64
configure> set next-hop gateway 2002::02
configure> save
Info: Parameter group ip-route “v6-route-2003-nw” saved
configure>
configure>
6. Display IPv6 routing table in Router-1
The configured static route should appear in the IPv6 routing table
operational> show route summary -F ipv6 data > IPv6 active routes
-
Destination : ::1/128
Gateway(s) : { ^loopback-16387
* Configure IPv6 global address 2002::02/64 to interface if-port-2
|
configure> |
modify |
parameter-group interface |
if-port-2 |
|
|
Info: Parameter group instance loaded for modification. |
||||
|
configure> |
default ip ipv4 |
|||
|
configure> |
set ip |
ipv6 enable yes |
||
|
configure> |
set ip |
ipv6 address 2002::02/64 |
||
|
configure> |
save |
|||
|
Info: Parameter group interface “if-port-2” |
saved |
|||
|
* Verify Interface configurations |
||||
|
operational> show |
interface all |
|||
|
Interface |
name |
Status |
Encaps- |
IP address |
|
ulation |
||||
——————————————————————————
|
if-port-1 |
up |
ethernet |
2003::1/64 |
|
fe80::226:f7ff:fe00:76/64 |
|||
|
if-port-2 |
up |
ethernet |
2002::2/64 |
|
fe80::226:f7ff:fe00:77/64 |
|||
|
if-port-3 |
down |
ethernet |
– |
|
if-port-4 |
down |
ethernet |
– |
|
if-port-5 |
down |
ethernet |
– |
|
if-port-6 |
down |
ethernet |
– |
|
if-port-7 |
down |
ethernet |
– |
|
if-port-8 |
down |
ethernet |
– |
|
management |
disabled |
ethernet |
10.0.0.12/24 |
Total number of interfaces displayed : 9 operational>
Check IPv6 information in “show interface details” command output
operational> show interface details if-port-1 if-port-2
9. Configure IPv6 static route in Router-2
* Configure a static route to reach 2001:00/64 network (Alice) with gateway as 2002::01( Router-1)
operational> configure
Entering configuration mode with exclusive access. configure> create parameter-group ip-route v6-route-2001-nw Info: Parameter group instance created. configure> show draft -e
[ ip-route:”v6-route-2001-nw” ]
*name “v6-route-2001-nw”
enable no
router “”
destination 0.0.0.0
netmask 0.0.0.0
next-hop {
router “”
gateway 0.0.0.0
label-switched-path “”
}
preference 30
metric 2
configure> set enable yes
configure> set router data
configure> set destination 2001::/64
Page 6/10
configure> set next-hop gateway 2002::01
configure> save
Info: Parameter group ip-route “v6-route-2001-nw” saved configure> show draft -e
[ ip-route:”v6-route-2001-nw” ]
*name “v6-route-2001-nw”
enable yes
router “data”
destination 2001:0000:0000:0000:0000:0000:0000:0000 netmask ffff:ffff:ffff:ffff:0000:0000:0000:0000 next-hop {
router “”
gateway 2002:0000:0000:0000:0000:0000:0000:0001 label-switched-path “”
}
preference 30
metric 2
configure>
10. Display IPv6 routing table in Router-2
operational> show route summary -F ipv6 data > IPv6 active routes
-
Destination : ::1/128
Gateway(s) : { ^loopback-16387
-
::1 }
Source
: direct
Flags
: –
-
Destination : 2001::/64
Gateway(s) : { if-port-2
-
2002::1 }
Source
: static
Flags
: –
-
Destination : 2002::/64
Gateway(s) : { if-port-2
-
-
}
-
Source : direct
Flags : –
-
Destination : 2003::/64
Gateway(s) : { if-port-1
-
-
}
-
Source : direct
Flags : –
-
Destination : fe80::/64
Gateway(s) : { if-port-1
-
-
}
-
Source : direct
Flags : –
-
Destination : fe80::/64
Gateway(s) : { if-port-2
-
-
}
-
|
Source |
: |
direct |
|
Flags |
: |
– |
|
Total number of |
IPv6 active routes displayed : 6 |
|
No IPv6 backup routes are available
operational>
11. Verify traffic flow between Alice and Bob
-
From Alice workstation ping Bob, observe the packet from and TTL in ping reply
-
From Alice workstation run tracepath to Bob’s IP. Observer the intermediate hops
-
Check IPv6 NDP table on Router-1 This is similar to ARP Table in IPv4.
operational> show ipv6 neighbour summary data
Host address MAC address Interface
——————————————————————————-
|
2002::1 |
00:26:f7:00:00:6e if-port-2 |
|
|
2003::2 |
00:26:f7:00:09:3c if-port-1 |
|
|
fe80::226:f7ff:fe00:6e |
00:26:f7:00:00:6e |
if-port-2 |
|
fe80::5d97:cf2f:4a3:d8cb |
00:26:f7:00:09:3c |
if-port-1 |
Total number of NDP entries displayed : 4 operational>
13. Verify auto-configured Link Local Address on IPv6 interfaces
All IPv6 enabled interfaces will have a link-local address. IPv6 link-local address is a unicast address that is configured automatically using the prefix FE80::/10 and port MAC in the modified EUI-64 format. The link-local address can also be manually configured.
Link-local addresses are used for a addressing on a single physical link. These addresses can be used to reach the neighboring nodes attached to the same link. Routers will not forward packets using link-local addresses. Two routers can have same link-local address and can still communicate over directly connected network. But, the global unicast address should be unique in a network as they are routable.
Login to Router-1 and check the auto-configured link local address.
For Example :
operational> show interface details if-port-1
-
Interface : if-port-1 General Information
——————-
ID:21
|
Encapsulation |
: ethernet |
|
|
MTU |
: 1500 |
|
|
Base port type |
: fast-ethernet |
|
|
Base port location |
: { shelf-1 { active-controller base-slot } port-1 } |
|
|
State Information |
||
|
—————– |
||
|
State |
: up |
|
|
Last state transition |
: 15:19:44, Monday, March 18, 2019 IST |
|
|
Work flags |
: — — —– —– |
|
|
Ethernet information |
||
|
——————– |
||
|
VLAN tagging |
: disabled |
|
|
IP information |
||
|
————– |
||
|
Router |
: data |
|
|
IPv6 information |
||
|
—————- |
||
|
Address |
: 2001::1 |
|
|
Netmask |
: ffff:ffff:ffff:ffff:: |
|
|
Link local Address |
: fe80::226:f7ff:fe00:6d <====== Combination of FE08 and port MAC |
|
|
Link local Netmask |
: ffff:ffff:ffff:ffff:: |
|
|
Scope Zone |
: 33488917 |
|
|
Preference |
: 1 |
|
|
Metric |
: 1 |
|
|
TE information |
||
|
————– |
||
|
Maximum Bandwidth |
: 10000 kbps |
|
|
Maximum Reservable Bandwidth |
: 10000 kbps |
|
|
Update threshold percentage |
: 10 |
|
operational>
operational> show fast-ethernet details { shelf-1 { active-controller base-slot } port-1 }
-
Port : { shelf-1 { active-controller base-slot } port-1 } Port details
————
Name :
MAC address : 00:26:f7:00:00:6d <=============
POST : passed
Media : copper
Loop back mode : no-loopback
State : up
Duplex mode : half-duplex
Speed : ten-mbps
Work flags : —- —-
operational>
14. Check the connectivity between Router-1 and Router-2 using Link Local Address Login to Router-2 and get the link-local address of interface connected to Router-1.
Now, Login to Router-1 and ping the link-local address on Router-2 and observe the response. When pinging link-local address, the the name if out-going interface should be specified in the command. If no interface or wrong interface name is specified, ping will result in error or unsuccessful.
Example:
Router-1
operational> ping data:fe80::226:f7ff:fe00:77%if-port-2
PING fe80:0:1ff:16:226:f7ff:fe00:6e –> fe80::226:f7ff:fe00:77%33488918
-
bytes from fe80::226:f7ff:fe00:77%33488918: icmp_seq=0 hoplimit=64 time=0.496
ms
-
bytes from fe80::226:f7ff:fe00:77%33488918: icmp_seq=1 hoplimit=64 time=0.505
ms
-
bytes from fe80::226:f7ff:fe00:77%33488918: icmp_seq=2 hoplimit=64 time=0.470
ms
-
bytes from fe80::226:f7ff:fe00:77%33488918: icmp_seq=3 hoplimit=64 time=0.427
ms
-
bytes from fe80::226:f7ff:fe00:77%33488918: icmp_seq=4 hoplimit=64 time=0.475
ms
—- PING Statistics—-
5 packets transmitted, 5 packets received, 0.0% packet loss round-trip min/avg/max/std-dev = 0.000/0.475/0.505/0.027 ms operational>
operational> ping -c 5 data:fe80::226:f7ff:fe00:77 Error: No source address found for this destination operational>
operational> ping data:fe80::226:f7ff:fe00:77%if-port-1
PING fe80:0:1ff:15:226:f7ff:fe00:6d –> fe80::226:f7ff:fe00:77%33488917
—- PING Statistics—-
8 packets transmitted, 0 packets received, 100.0% packet loss operational>
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