IxNetwork NGPF: DHCP example configuration with traffic

Scenario:
Use 2 ports back to back
Configure 1000 DHCP clients each 100  in the same VLAN and  10 DHCP server, one in each vlan. Send L2/3 Traffic from client to his server

We are going to start the configuration by adding just 1 DHCP client in each VLAN

Configure DHCP clients
1.a Go to Scenario and add a port in Topology1

1.b Enable DHCP client on  the port and click finish

1.c Automatically a   Device group containing 10 instances ( default) will appear in topology

2. Go to Protocol Tree->Next Gen Framework subtree and click on Ethernet
  2.a From the master pattern ( blue raw)  enable VLAN

  2.b From master patter set the VLAN as incremental step 1

3. Go to Protocol Tree->Next Gen Framework subtree and click on DHCP client
3.a  From master pattern  configure Server Address as incremental

Configure DHCP server
1.a Go to Scenario and add a new topology

1.b Enable DHCP client on  the port and click finish

1.c Automatically a   Device group containing 10 instances ( default) will appear in topology

2. Go to Protocol Tree->Next Gen Framework subtree and click on Ethernet
  2.a From the master pattern ( blue raw)  enable VLAN and set the VLAN as incremental step 1

3. Go to Protocol Tree->Next Gen Framework subtree and click on IP
   3.a Set the DHCP servers IP addresses

4. Go to Protocol Tree->Next Gen Framework subtree and click on DHCP server
   4.a  From master pattern  set the pool  initial value

   4.b From master pattern  set the pool  size

   4.c  From master pattern  set the pool   gateway

Start DHCP server

Start the DHCP  clients. 
All the DHCP  clients should obtain an IP address

Modify DHCP client configuration to map 1000 DHCP clients
*** stop the DHCP clients 
1. Modify the number of instances to 1000

2.a Go to Protocol Tree->Next Gen Framework subtree and click on Ethernet
       Change the VLAN ID pattern to Custom from Master raw

2.b Go to Protocol Tree->Next Gen Framework subtree and click on DHCP client
        From master pattern  configure Server Address as Custom

Start devices and check all are up

Create the Traffic
Configure a Traffic Item which sends traffic in each VLAN from the clients to the server
1. Open Add L2/3  traffic wizard
1.a On source side add 10 selection each containing 100 adresses

1.b On destination side add 10 selection  each containing 1 address

*** the selection are paired 1to1  in the order that they were added, for example Selection1 from source side will send traffic only to Selection1 on destination side and so on.

1.c Verify the pattern by  checking the flow groups in preview

2.Start traffic. Check that the load is distributed equally to the destination IP address
*** Enable tracking on IP destination when you create the Traffic Item in order to have this option

IxNetwork IGMP configuration

*****Configuration steps

1.       Select the ports

Add 2 ports in  the configuration and rename them as IGMP Host and Querier

2.        Enable IGMP protocol on the ports

Click on Protocols  on Protocol tree and then switching to Multicast tab

3.       Configure the IP addresses on the ports

IGMP Querier  IP=1.1.1.1

IGMP Host IP=1.1.1.100

You need to  Add Interfaces and Add IPv4 addresses on the ports

Enable the interfaces, the port link should be green without exclamation mark

4.       IGMP Querier configuration

Go to IGMP  on Protocol tree and switch to Ports tab. Set number of queriers to 1 Number of host to  0

On the Querier tab add the Connected Interface to the   Querier and enable it

Set the querier to use IGMPv3

        5.  Configure IGMP host:

Go to IGMP  on Protocol tree and switch to Ports tab. Set number of queriers to 0 Number of host to  1

On the Hosts tab add the Connected Interface and enable it

 Set host type to IGMPV3

On the Host tab set No of Group Ranges to 1

Switch to Group Ranges tab and set the multicast group for which the IGMP host is member

6.       Start IGMP

*****Tools for troubleshooting

1.       Capture packets

 Go to Captures button and  enable control capture on ports. Click  on Start Capture from Main ribbon

2.       Use  Port Trace  Window:
On  Protocol Tree right-click on a port and chose Open Trace Window. Select the level of debugging.  

    


      In the Trace Window you see packets received and sent by the port

Test example: QoS remarking

Setup  information:

Consider the following  setup : 

(Ixia)port1--------------Gi1/1(Router)Gi1/2-------------port2 (Ixia)

IP1=11.1.1.100/24                                                            IP2=11.1.2.100/24

GW=11.1.1.1                                                                     GW=11.1.2.1

We are going to send traffic from IP1 to IP2 using AF11

When he receives traffic on Interface Gi1/1 the DUT will remark DSCP value to AF21

af11     Match packets with AF11 dscp (001010)₂=(10)₁₀

af21     Match packets with AF21 dscp (010010)₂=(18)₁₀

IxNetwork Configuration

Step 1. Create protocol interfaces

Step2. Create L2-3 Traffic Item

2.1 Add a L2-3 traffic item 

2.2 Select the connected interface as  source/destination endpoints 

2.3 On the Paket/ QOS page set IP priority as DiffServ, AF11 

2.4 On Flow Goup  page select to create Flow groups based on Source/Destination Endpoint 

2.5 On Flow Tracking page select to track IP-AF PBH values

2.6 On Flow Tracking page  don’t forget to enable Egress tracking for DSCP 

**** All the other settings are default. Click Finish  on Advance Traffic Wizard and you are good to go.

Step3. Verify results

3.1 Start traffic

3.2 On Statistics window go to Traffic Item Statistics tab. Right-click on Traffic Item and choose Drill down per IPv4: Assured Forwarding PBH

3.3  After performing previous step  you are  automatically switched to  User Defined Statistics tab

Right-Click on the item and choose to see Egress values of DSCP

****Right now on statistics window you will have the intial and also the  new marked values of DSCP

DUT Configuration

1 Steps taken to configure the DUT and configuration  explain

In order to set a new DSCP value on an interesting traffic you will need to perform the following steps:

1.       Identify the interesting traffic with an ACL

2.        Create a Class Map for matching the Network Traffic using the ACL

3.       Create a Policy Map for Applying a QoS Feature to Network Traffic classified  by  the class map 

4.        Attaching the Policy Map to an Interface

! Configure IP address on the interfaces

7606-S(config)#int gi1/1

7606-S(config-if)#ip add 11.1.1.1 255.255.255.0

7606-S(config-if)#exit

7606-S(config)#int gi 1/2

7606-S(config-if)#ip add 11.1.2.1 255.255.255.0

7606-S(config-if)#exit

7606-S(config)#do show ip int brief

Interface              IP-Address      OK? Method Status                Protocol

GigabitEthernet1/1     11.1.1.1        YES manual up                    up

GigabitEthernet1/2     11.1.2.1        YES manual up                    up

!  Identify the  interesting traffic (11.1.1.100 -----> 11.1.2.100) with an  ACL

7606-S(config)#access-list 101 permit ip host 11.1.1.100 host 11.1.2.100

7606-S(config)#do show access-list 101

Extended IP access list 101

10     ermit ip host 11.1.1.100 host 11.1.2.100

! Create a Class Map for matching the Network Traffic using the ACL

7606-S(config)#class-map cmap-acl-101

7606-S(config-cmap)#match  access-group 101

! Create a Policy Map for QoS  remarking of the Network Traffic classified  by  the class map 

7606-S(config)#policy-map pmap-acl-101

7606-S(config-pmap)#class cmap-acl-101

7606-S(config-pmap-c)#set dscp af21

7606-S(config)#do show policy-map pmap-acl-101

  Policy Map pmap-acl-101

    Class cmap-acl-101

      set dscp af21

! Attach the Policy Map to an Interface

7606-S(config)#interface gi 1/1

7606-S(config-if)#service-policy input pmap-acl-101

7606-S(config-if)#do show policy-map int gi1/1

 GigabitEthernet1/1

  Service-policy input: pmap-acl-101

    class-map: cmap-acl-101 (match-all)

      Match: access-group 101

      set dscp 18:

      Earl in slot 5 :

        30121000 bytes

        5 minute offered rate 785080 bps

        aggregate-forwarded 30121000 bytes

    Class-map: class-default (match-any)

      0 packets, 0 bytes

      5 minute offered rate 0000 bps, drop rate 0000 bps

      Match: any

        0 packets, 0 bytes

        5 minute rate 0 bps

2. Actual DUT configuration

ena

conf ter

int gi1/1

ip add 11.1.1.1 255.255.255.0

exit

int gi 1/2
ip add 11.1.2.1 255.255.255.0

exit

access-list 101 permit ip host 11.1.1.100 host 11.1.2.100

class-map cmap-acl-101
match access-group 101

exit

policy-map pmap-acl-101
class cmap-acl-101
set dscp af21

exit

interface gi 1/1
service-policy input pmap-acl-101

exit