It all started of as a thought in mind to write a new blog post on topic which I personally feel that no one talked about earlier or even any CCIE Lab Workbooks covered. But after some time my situation was like:
Okay, I'll talk about that later. First lets get started with what we are going to learn new today. The idea in mind was to combine two Evils together.
Usually CCNA, CCNP & Evil CCIEs are familiar with these topics individually:
1. Router On A Stick
2. Ether-Channel
But what I thought was to combine these two together and come up with a new solution as - Router On A Stick With Ether-Channel, Which will look something like :-)
Now after enough fun let's get into details:
Now before we move ahead, for those which are not familiar with these two topics (Ether-Channel & Router On A Stick), I would recommend following Pre readings :
http://www.thebryantadvantage.com/CCNA640802CCENTRouterOnAStick.htm
http://www.thebryantadvantage.com/CCNA640802CCENTRouterOnAStickConfiguration.htm
http://www.thebryantadvantage.com/CCNA640802CCENTRouterOnAStickTroubleshooting.htm
http://blog.ipexpert.com/2009/12/23/explaining-etherchannel/
http://www.cisco.com/en/US/tech/tk389/tk213/technologies_white_paper09186a0080092944.shtml
http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a0080094714.shtml
Now lets move to Cli where I am going to show everything into 2 Important Steps:
1. Configuration
2. Verification
BTW, I used a Cisco 3725 Router with 16 Port Switching Module to emulate the Switch part here so some of verification and configuration commands are specific to this setup as here Router is acting as a Switch.
SWITCH
======
SW#vlan database
SW(vlan)#vlan 10
VLAN 10 added:
Name: VLAN0010
SW(vlan)#vlan 20
VLAN 20 added:
Name: VLAN0020
SW(vlan)#apply
APPLY completed.
SW(vlan)#exit
APPLY completed.
Exiting....
SW#conf t
Enter configuration commands, one per line. End with CNTL/Z.
SW(config)#int f1/3
SW(config-if)#switchport mode access
SW(config-if)#switchport access vlan 10
SW(config-if)#spanning-tree portfast < Optional
%Warning: portfast should only be enabled on ports connected to a single host.
Connecting hubs, concentrators, switches, bridges, etc.to this interface
when portfast is enabled, can cause temporary spanning tree loops.
Use with CAUTION
%Portfast has been configured on FastEthernet1/3 but will only
have effect when the interface is in a non-trunking mode.
SW(config-if)#exit
SW(config)#int f1/4
SW(config-if)#switchport mode access
SW(config-if)#switchport access vlan 20
SW(config-if)#spanning-tree portfast < Optional
%Warning: portfast should only be enabled on ports connected to a single host.
Connecting hubs, concentrators, switches, bridges, etc.to this interface
when portfast is enabled, can cause temporary spanning tree loops.
Use with CAUTION
%Portfast has been configured on FastEthernet1/3 but will only
have effect when the interface is in a non-trunking mode.
SW(config-if)#exit
SW(config)#interface range f1/0 - 1
SW(config-if-range)#channel-group 1 mode on
SW(config-if-range)#exit
SW(config)#
SW(config)#interface port-channel 1 < All Trunk Config Goes To Port-Channel
SW(config-if)#switchport trunk encapsulation dot1q
SW(config-if)#switchport mode trunk
SW(config-if)#exit
R1
==
R1(config)#int port-channel 1 < Lets first Create Port-Channel Interface
R1(config-if)#exit
R1(config)#interface range f0/0 - 1
R1(config-if-range)#channel-group 1
%Interface MTU set to channel-group MTU 1500.
%Interface MTU set to channel-group MTU 1500.
R1(config-if-range)#no shut
R1(config-if-range)#exit
R1(config)#int port-channel 1.10 < Create Port-Channel Sub-interface for VLAN 10
R1(config-subif)#encapsulation dot1Q 10
R1(config-subif)#ip add 10.0.0.254 255.255.255.0
R1(config-subif)#no shut
R1(config-subif)#exit
R1(config)#int port-channel 1.20 < Create Port-Channel Sub-interface for VLAN 20
R1(config-subif)#encapsulation dot1Q 20
R1(config-subif)#ip add 20.0.0.254 255.255.255.0
R1(config-subif)#no shut
R1(config-subif)#end
Verification:
========
R1#sh ip int brief | exclude down
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset up up
FastEthernet0/1 unassigned YES unset up up
Port-channel1 unassigned YES unset up up
Port-channel1.10 10.0.0.254 YES manual up up
Port-channel1.20 20.0.0.254 YES manual up up
SW#sh vlan-switch brief | include _10_|_20_
10 VLAN0010 active Fa1/3
20 VLAN0020 active Fa1/4
SW#sh interface trunk
Port Mode Encapsulation Status Native vlan
Po1 on 802.1q trunking 1
Port Vlans allowed on trunk
Po1 1-1005
Port Vlans allowed and active in management domain
Po1 1,10,20
Port Vlans in spanning tree forwarding state and not pruned
Po1 1,10,20
SW#sh spanning-tree vlan 10 | include forwarding
Port 44 (FastEthernet1/3) of VLAN10 is forwarding
Number of transitions to forwarding state: 1
Port 321 (Port-channel1) of VLAN10 is forwarding
Number of transitions to forwarding state: 1
SW#
SW#sh spanning-tree vlan 20 | include forwarding
Port 45 (FastEthernet1/4) of VLAN20 is forwarding
Number of transitions to forwarding state: 1
Port 321 (Port-channel1) of VLAN20 is forwarding
Number of transitions to forwarding state: 1
SW#sh etherchannel summary | b Group
Group Port-channel Ports
-----+------------+-----------------------------------------------------------
1 Po1(SU) Fa1/0(P) Fa1/1(P)
HOST-A#sh ip int b | exclude unassignd|down
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.0.0.3 YES manual up up
HOST-A#ping 20.0.0.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 20.0.0.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/34/68 ms
HOST-B#sh ip int brief | e una|do
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 20.0.0.4 YES manual up up
HOST-B#ping 10.0.0.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/30/72 ms
R1#sh ip arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.0.0.3 2 c416.1064.0000 ARPA Port-channel1.10
Internet 10.0.0.254 - ca14.1c58.0008 ARPA Port-channel1.10
Internet 20.0.0.4 2 c417.1064.0000 ARPA Port-channel1.20
Internet 20.0.0.254 - ca14.1c58.0008 ARPA Port-channel1.20
R1#sh ip route | b ^G
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.0.0.0/24 is directly connected, Port-channel1.10
L 10.0.0.254/32 is directly connected, Port-channel1.10
20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 20.0.0.0/24 is directly connected, Port-channel1.20
L 20.0.0.254/32 is directly connected, Port-channel1.20
SW#sh mac-address-table dynamic
Non-static Address Table:
Destination Address Address Type VLAN Destination Port
------------------- ------------ ---- --------------------
ca14.1c58.0008 Dynamic 1 Po1
c416.1064.0000 Dynamic 10 FastEthernet1/3
c417.1064.0000 Dynamic 20 FastEthernet1/4
HOST-A#sh int f0/0 | i bia
Hardware is Gt96k FE, address is c416.1064.0000 (bia c416.1064.0000)
HOST-B#sh int f0/0 | i bia
Hardware is Gt96k FE, address is c417.1064.0000 (bia c417.1064.0000)
R1#sh int f0/0 | i bia
Hardware is i82543 (Livengood), address is ca14.1c58.0008 (bia ca14.1c58.0008)
R1#sh int f0/1 | i bia
Hardware is i82543 (Livengood), address is ca14.1c58.0008 (bia ca14.1c58.0006)
R1#sh int Po1 | i bia
Hardware is FEChannel, address is ca14.1c58.0008 (bia 0000.0000.0000)
And of course that thing which made smashing my head against the key-board, Here are the details:
https://learningnetwork.cisco.com/thread/50039?tstart=0
Further Readings:
http://www.cisco.com/en/US/prod/collateral/routers/ps5855/prod_white_paper0900aecd806f698a.pdf
HTH...
Deepak Arora
Evil CCIE
Okay, I'll talk about that later. First lets get started with what we are going to learn new today. The idea in mind was to combine two Evils together.
Usually CCNA, CCNP & Evil CCIEs are familiar with these topics individually:
1. Router On A Stick
2. Ether-Channel
But what I thought was to combine these two together and come up with a new solution as - Router On A Stick With Ether-Channel, Which will look something like :-)
Now after enough fun let's get into details:
Physical Topology
Logical Topology
Now before we move ahead, for those which are not familiar with these two topics (Ether-Channel & Router On A Stick), I would recommend following Pre readings :
http://www.thebryantadvantage.com/CCNA640802CCENTRouterOnAStick.htm
http://www.thebryantadvantage.com/CCNA640802CCENTRouterOnAStickConfiguration.htm
http://www.thebryantadvantage.com/CCNA640802CCENTRouterOnAStickTroubleshooting.htm
http://blog.ipexpert.com/2009/12/23/explaining-etherchannel/
http://www.cisco.com/en/US/tech/tk389/tk213/technologies_white_paper09186a0080092944.shtml
http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a0080094714.shtml
Now lets move to Cli where I am going to show everything into 2 Important Steps:
1. Configuration
2. Verification
BTW, I used a Cisco 3725 Router with 16 Port Switching Module to emulate the Switch part here so some of verification and configuration commands are specific to this setup as here Router is acting as a Switch.
SWITCH
======
SW#vlan database
SW(vlan)#vlan 10
VLAN 10 added:
Name: VLAN0010
SW(vlan)#vlan 20
VLAN 20 added:
Name: VLAN0020
SW(vlan)#apply
APPLY completed.
SW(vlan)#exit
APPLY completed.
Exiting....
SW#conf t
Enter configuration commands, one per line. End with CNTL/Z.
SW(config)#int f1/3
SW(config-if)#switchport mode access
SW(config-if)#switchport access vlan 10
SW(config-if)#spanning-tree portfast < Optional
%Warning: portfast should only be enabled on ports connected to a single host.
Connecting hubs, concentrators, switches, bridges, etc.to this interface
when portfast is enabled, can cause temporary spanning tree loops.
Use with CAUTION
%Portfast has been configured on FastEthernet1/3 but will only
have effect when the interface is in a non-trunking mode.
SW(config-if)#exit
SW(config)#int f1/4
SW(config-if)#switchport mode access
SW(config-if)#switchport access vlan 20
SW(config-if)#spanning-tree portfast < Optional
%Warning: portfast should only be enabled on ports connected to a single host.
Connecting hubs, concentrators, switches, bridges, etc.to this interface
when portfast is enabled, can cause temporary spanning tree loops.
Use with CAUTION
%Portfast has been configured on FastEthernet1/3 but will only
have effect when the interface is in a non-trunking mode.
SW(config-if)#exit
SW(config)#interface range f1/0 - 1
SW(config-if-range)#channel-group 1 mode on
SW(config-if-range)#exit
SW(config)#
SW(config)#interface port-channel 1 < All Trunk Config Goes To Port-Channel
SW(config-if)#switchport trunk encapsulation dot1q
SW(config-if)#switchport mode trunk
SW(config-if)#exit
R1
==
R1(config)#int port-channel 1 < Lets first Create Port-Channel Interface
R1(config-if)#exit
R1(config)#interface range f0/0 - 1
R1(config-if-range)#channel-group 1
%Interface MTU set to channel-group MTU 1500.
%Interface MTU set to channel-group MTU 1500.
R1(config-if-range)#no shut
R1(config-if-range)#exit
R1(config)#int port-channel 1.10 < Create Port-Channel Sub-interface for VLAN 10
R1(config-subif)#encapsulation dot1Q 10
R1(config-subif)#ip add 10.0.0.254 255.255.255.0
R1(config-subif)#no shut
R1(config-subif)#exit
R1(config)#int port-channel 1.20 < Create Port-Channel Sub-interface for VLAN 20
R1(config-subif)#encapsulation dot1Q 20
R1(config-subif)#ip add 20.0.0.254 255.255.255.0
R1(config-subif)#no shut
R1(config-subif)#end
Verification:
========
R1#sh ip int brief | exclude down
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset up up
FastEthernet0/1 unassigned YES unset up up
Port-channel1 unassigned YES unset up up
Port-channel1.10 10.0.0.254 YES manual up up
Port-channel1.20 20.0.0.254 YES manual up up
SW#sh vlan-switch brief | include _10_|_20_
10 VLAN0010 active Fa1/3
20 VLAN0020 active Fa1/4
SW#sh interface trunk
Port Mode Encapsulation Status Native vlan
Po1 on 802.1q trunking 1
Port Vlans allowed on trunk
Po1 1-1005
Port Vlans allowed and active in management domain
Po1 1,10,20
Port Vlans in spanning tree forwarding state and not pruned
Po1 1,10,20
SW#sh spanning-tree vlan 10 | include forwarding
Port 44 (FastEthernet1/3) of VLAN10 is forwarding
Number of transitions to forwarding state: 1
Port 321 (Port-channel1) of VLAN10 is forwarding
Number of transitions to forwarding state: 1
SW#
SW#sh spanning-tree vlan 20 | include forwarding
Port 45 (FastEthernet1/4) of VLAN20 is forwarding
Number of transitions to forwarding state: 1
Port 321 (Port-channel1) of VLAN20 is forwarding
Number of transitions to forwarding state: 1
SW#sh etherchannel summary | b Group
Group Port-channel Ports
-----+------------+-----------------------------------------------------------
1 Po1(SU) Fa1/0(P) Fa1/1(P)
HOST-A#sh ip int b | exclude unassignd|down
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.0.0.3 YES manual up up
HOST-A#ping 20.0.0.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 20.0.0.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/34/68 ms
HOST-B#sh ip int brief | e una|do
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 20.0.0.4 YES manual up up
HOST-B#ping 10.0.0.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/30/72 ms
R1#sh ip arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.0.0.3 2 c416.1064.0000 ARPA Port-channel1.10
Internet 10.0.0.254 - ca14.1c58.0008 ARPA Port-channel1.10
Internet 20.0.0.4 2 c417.1064.0000 ARPA Port-channel1.20
Internet 20.0.0.254 - ca14.1c58.0008 ARPA Port-channel1.20
R1#sh ip route | b ^G
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.0.0.0/24 is directly connected, Port-channel1.10
L 10.0.0.254/32 is directly connected, Port-channel1.10
20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 20.0.0.0/24 is directly connected, Port-channel1.20
L 20.0.0.254/32 is directly connected, Port-channel1.20
SW#sh mac-address-table dynamic
Non-static Address Table:
Destination Address Address Type VLAN Destination Port
------------------- ------------ ---- --------------------
ca14.1c58.0008 Dynamic 1 Po1
c416.1064.0000 Dynamic 10 FastEthernet1/3
c417.1064.0000 Dynamic 20 FastEthernet1/4
HOST-A#sh int f0/0 | i bia
Hardware is Gt96k FE, address is c416.1064.0000 (bia c416.1064.0000)
HOST-B#sh int f0/0 | i bia
Hardware is Gt96k FE, address is c417.1064.0000 (bia c417.1064.0000)
R1#sh int f0/0 | i bia
Hardware is i82543 (Livengood), address is ca14.1c58.0008 (bia ca14.1c58.0008)
R1#sh int f0/1 | i bia
Hardware is i82543 (Livengood), address is ca14.1c58.0008 (bia ca14.1c58.0006)
R1#sh int Po1 | i bia
Hardware is FEChannel, address is ca14.1c58.0008 (bia 0000.0000.0000)
And of course that thing which made smashing my head against the key-board, Here are the details:
https://learningnetwork.cisco.com/thread/50039?tstart=0
Further Readings:
http://www.cisco.com/en/US/prod/collateral/routers/ps5855/prod_white_paper0900aecd806f698a.pdf
HTH...
Deepak Arora
Evil CCIE
