Week 9 IPv6 Configuration and Static Routing

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:


















 Steps :

    1. Create and deploy the given topology.

    2. Configure the PC/Workstation IP address as mentioned in topology.

Alice
IPv6 address – 2001::02/64 , Gateway – 2001::01

Bob
IPv6 address – 2003::02/64 , Gateway – 2003::01


Example :




































3. Enable IPv6 in Router-1

operational> configure
Entering configuration mode with exclusive access.
configure> modify parameter-group router data
Info: Parameter group instance loaded for modification.
configure> set ipv6 enable yes
configure> save

Info: Parameter group router "data" saved configure>

Check IPv6 information in router details

operational> show router details data



Page 2/10
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

Page 4/10

::1 }
Source
: direct
Flags
: -

    • Destination : 2001::/64
Gateway(s)  : { if-port-1

:: }
Source
: direct
Flags
: -

    • Destination : 2002::/64
Gateway(s)  : { if-port-2

:: }
Source
: direct
Flags
: -

    • Destination : 2003::/64
Gateway(s)  : { if-port-2

2002::2 }
Source
: static
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>


7. Enable IPv6 in Router-2

operational> configure
Entering configuration mode with exclusive access.
configure> modify parameter-group router data

Info: Parameter group instance loaded for modification.
configure> set ipv6 enable yes
configure> save

Info: Parameter group router "data" saved configure>

Check IPv6 information in router details

operational> show router details data



8. Configure IPv6 interfaces in Router-2

* Configure IPv6 global address 2003::01/64 to interface if-port-1

configure> modify parameter-group interface if-port-1 Info: Parameter group instance loaded for modification. configure> default ip ipv4

configure> set ip ipv6 enable yes configure> set ip ipv6 address 2003::01/64 configure> save

Info: Parameter group interface "if-port-1" saved configure> exit


Page 5/10
* 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>







Page 7/10
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







































    12. 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>








Page 8/10
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.

Page 9/10
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

    16 bytes from fe80::226:f7ff:fe00:77%33488918: icmp_seq=0 hoplimit=64 time=0.496
ms

    16 bytes from fe80::226:f7ff:fe00:77%33488918: icmp_seq=1 hoplimit=64 time=0.505
ms

    16 bytes from fe80::226:f7ff:fe00:77%33488918: icmp_seq=2 hoplimit=64 time=0.470
ms

    16 bytes from fe80::226:f7ff:fe00:77%33488918: icmp_seq=3 hoplimit=64 time=0.427

ms

    16 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>





























Page 10/10