Firstly I can't say how much nicer it is to use IOU and not have to remember to use "copy run unix:" instead of "copy run start", I can't tell you how many times my IOU router has crashed because I forgot to save to unix rather than the conventional way. Now with IOU running within GNS3 I can copy run start to my hearts content!
Yesterday I tried to play around with the server settings to connect the native GNS3 router to the IOU device. Don't try this at home, or in the office, or on the bus. This feature won't make an appearance until the next alpha release. But I found this out the hard way, and nothing was talking:
After much searching I found the file hidden away in %APPDATA%\GNS3\GNS3.ini and in there is my failed attempt to bridge the two:
[Servers] local_server_host=192.168.56.1 local_server_port=8000 local_server_path=C:/Program Files (x86)/GNS3-ER/gns3server.exe remote\size=1 remote\1\host=192.168.56.101 remote\1\port=8000Once I changed the file back to:
[Servers] local_server_host=127.0.0.1 local_server_port=8000 local_server_path=C:/Program Files (x86)/GNS3-ER/gns3server.exe remote\size=1 remote\1\host=192.168.56.101 remote\1\port=8000Then everything is back up and running as it should be!
In the previous post I was having issues with ethernet interfaces on my IOU devices. I did think that maybe it was due to the IOU image I was using, so now I have switched images now. It didn't help that I was being stupid and didn't use the "no switchport" command, which then would have allowed me to specify an IP address, but now we are good to go!
IOU5#conf t Enter configuration commands, one per line. End with CNTL/Z. IOU5(config)#vlan 10 IOU5(config-vlan)#exit % Applying VLAN changes may take few minutes. Please wait... IOU5(config)#int vlan 10 IOU5(config-if)#ip add *Apr 3 09:41:32.651: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to down IOU5(config-if)#ip add 1.1.1.1 255.255.255.0 IOU5(config-if)# IOU5(config-if)#int e0/0 IOU5(config-if)#ip add IOU5(config-if)#no switchport IOU5(config-if)#ip add IOU5(config-if)#ip address *Apr 3 09:42:56.715: %LINK-3-UPDOWN: Interface Ethernet0/0, changed state to up IOU5(config-if)#exit IOU5(config)#exit IOU5#sh ver | i IOS Cisco IOS Software, Linux Software (I86BI_LINUX_L2-UPK9-M), Experimental Version 15.0(20120621:060510) [dstivers-june20-2012-golden_spike 101] IOU5#One thing to note is that the does seem to be a limit on the size of the IOU image you can upload via the webpage. This can be sorted by using WinSCP to copy the file to the correct location. This is then picked up correctly, but you do need to change the permissions, the group needs to be gns3 and so does the owner, and it needs to be executable - if you don't change the permissions you will get this error: "Server error [-3200]: IOU1: could not start IOU: [Errno 13] Permission denied".
Enough chat, let's dig in! Here is our topology for today:
The ability to add text to the topology doesn't appear to be working at the moment, so we'll have to make do with a few show commands to be able to work out the interfaces:
IOU1#sh cdp neigh | beg Device Device ID Local Intrfce Holdtme Capability Platform Port ID IOU3 Eth 0/1 145 R S Linux Uni Eth 0/0 IOU2 Eth 0/0 129 R S Linux Uni Eth 0/0 IOU4 Eth 0/2 140 R S Linux Uni Eth 0/2 IOU1# IOU2#sh cdp neigh | beg Device Device ID Local Intrfce Holdtme Capability Platform Port ID IOU3 Eth 0/1 162 R S Linux Uni Eth 0/1 IOU1 Eth 0/0 131 R S Linux Uni Eth 0/0 IOU5 Eth 0/2 150 R S Linux Uni Eth 0/1 IOU2# IOU3#sh cdp neigh | beg Device Device ID Local Intrfce Holdtme Capability Platform Port ID IOU2 Eth 0/1 130 R S Linux Uni Eth 0/1 IOU1 Eth 0/0 136 R S Linux Uni Eth 0/1 IOU5 Eth 0/3 152 R S Linux Uni Eth 0/0 IOU4 Eth 0/2 166 R S Linux Uni Eth 0/0 IOU3# IOU4#sh cdp neigh | beg Device Device ID Local Intrfce Holdtme Capability Platform Port ID IOU3 Eth 0/0 130 R S Linux Uni Eth 0/2 IOU1 Eth 0/2 159 R S Linux Uni Eth 0/2 IOU5 Eth 0/1 143 R S Linux Uni Eth 0/2 IOU4# IOU5#sh cdp neigh | beg Device Device ID Local Intrfce Holdtme Capability Platform Port ID IOU3 Eth 0/0 150 R S Linux Uni Eth 0/3 IOU2 Eth 0/1 152 R S Linux Uni Eth 0/2 IOU4 Eth 0/2 151 R S Linux Uni Eth 0/1 IOU5#On IOU1 I have created a couple of VLANs:
IOU1#sh vlan
VLAN Name Status Ports
---- ---------------------------- ------- ---------------------------
1 default active Et0/3, Et1/0, Et1/1, Et1/2
Et1/3
10 VLAN10 active
20 VLAN20 active
30 VLAN30 active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
All interfaces have been set to trunk using the commands "switchport trunk encapsulation dot1q" followed by "switchport mode trunk". IOU1 is set as the VTP server for the domain 802101.com and the others are set as clients (I am only showing IOU2 though):IOU1(config)#vtp domain 802101.com Changing VTP domain name from NULL to 802101.com IOU1(config)# *Apr 3 10:20:17.623: %SW_VLAN-6-VTP_DOMAIN_NAME_CHG: VTP domain name changed to 802101.com. IOU1(config)#vtp mode server Device mode already VTP Server for VLANS. IOU1(config)# IOU2(config)#vtp domain 802101.com Domain name already set to 802101.com. IOU2(config)#vtp mode client Setting device to VTP Client mode for VLANS. IOU2(config)#The switches now pick up the VLANs created on IOU1 (again just showing IOU2):
IOU2#sh vlan
VLAN Name Status Ports
---- ---------------------------- --------- ---------------------------
1 default active Et0/3, Et1/0, Et1/1, Et1/2
Et1/3
10 VLAN10 active
20 VLAN20 active
30 VLAN30 active
So far we havn't done anything that new here, but it does show that GNS3 now supports switching. One of the new features is support for Rapid Spanning Tree, to lets set that up as well. IOU1 will become the root for VLAN10, IOU2 the roo for VLAN20 and IOU3 the root for VLAN30. IOU4 will be the secondary root for VLAN 10 and 20, and IOU5 will be the secondary root for VLAN30:IOU1(config)#spanning-tree mode rapid-pvst
IOU1(config)#spanning-tree vlan 10 root primary
IOU1(config)#
IOU2(config)#spanning-tree mode rapid-pvst
IOU2(config)#spanning-tree vlan 20 root primary
IOU2(config)#
IOU3(config)#spanning-tree mode rapid-pvst
IOU3(config)#spanning-tree vlan 30 root primary
IOU3(config)#
IOU4(config)#spanning-tree mode rapid-pvst
IOU4(config)#spanning-tree vlan 10 root secondary
IOU4(config)#spanning-tree vlan 20 root secondary
IOU4(config)#
IOU5(config)#spanning-tree mode rapid-pvst
IOU5(config)#spanning-tree vlan 30 root secondary
IOU1#sh spanning-tree vlan 10
VLAN0010
Spanning tree enabled protocol rstp
Root ID Priority 24586
Address aabb.cc00.0100
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 24586 (priority 24576 sys-id-ext 10)
Address aabb.cc00.0100
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- -------------------
Et0/0 Desg FWD 100 128.1 Shr
Et0/1 Desg FWD 100 128.2 Shr
Et0/2 Desg FWD 100 128.3 Shr
IOU1#
IOU2#sh spanning-tree vlan 20
VLAN0020
Spanning tree enabled protocol rstp
Root ID Priority 24596
Address aabb.cc00.0200
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 24596 (priority 24576 sys-id-ext 20)
Address aabb.cc00.0200
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- -------------------
Et0/0 Desg LRN 100 128.1 Shr Dispute
Et0/1 Desg FWD 100 128.2 Shr
Et0/2 Desg FWD 100 128.3 Shr
IOU2#
IOU3#sh spanning-tree vlan 30
VLAN0030
Spanning tree enabled protocol rstp
Root ID Priority 24606
Address aabb.cc00.0300
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 24606 (priority 24576 sys-id-ext 30)
Address aabb.cc00.0300
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- -------------------
Et0/0 Desg FWD 100 128.1 Shr
Et0/1 Desg FWD 100 128.2 Shr
Et0/2 Desg FWD 100 128.3 Shr
Et0/3 Desg FWD 100 128.4 Shr
IOU3#
IOU5#sh spanning-tree vlan 30
VLAN0030
Spanning tree enabled protocol rstp
Root ID Priority 24606
Address aabb.cc00.0300
Cost 100
Port 1 (Ethernet0/0)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 28702 (priority 28672 sys-id-ext 30)
Address aabb.cc00.0500
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- -------------------
Et0/0 Root FWD 100 128.1 Shr
Et0/1 Desg FWD 100 128.2 Shr
Et0/2 Desg FWD 100 128.3 Shr
IOU5#
We can add redundant links into our topology, and RSTP happily plays along (again with the added bonus that we don't have to switch the device off to add the link!):
IOU2#sh ip int bri | i up
Interface IP-Address OK? Method Status Protocol
Ethernet0/0 unassigned YES unset up up
Ethernet0/1 unassigned YES unset up up
Ethernet0/2 unassigned YES unset up up
Ethernet0/3 unassigned YES unset up up
Ethernet1/0 unassigned YES unset up up
Ethernet1/1 unassigned YES unset up up
Ethernet1/2 unassigned YES unset up up
Ethernet1/3 unassigned YES unset up up
IOU2#
*Apr 3 10:36:06.955: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet1/1, changed state to down
*Apr 3 10:36:07.959: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet1/1, changed state to up
IOU2#sh cdp neigh | beg Device
Device ID Local Intrfce Holdtme Capability Platform Port ID
IOU3 Eth 1/1 166 R S Linux Uni Eth 1/1
IOU3 Eth 0/1 137 R S Linux Uni Eth 0/1
IOU1 Eth 0/3 146 R S Linux Uni Eth 1/0
IOU1 Eth 0/0 157 R S Linux Uni Eth 0/0
IOU5 Eth 1/0 133 R S Linux Uni Eth 1/0
IOU5 Eth 0/2 128 R S Linux Uni Eth 0/1
IOU2#sh spanning-tree vlan 20
VLAN0020
Spanning tree enabled protocol rstp
Root ID Priority 24596
Address aabb.cc00.0200
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 24596 (priority 24576 sys-id-ext 20)
Address aabb.cc00.0200
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- -----------------
Et0/0 Desg FWD 100 128.1 Shr
Et0/1 Desg FWD 100 128.2 Shr
Et0/2 Desg FWD 100 128.3 Shr
Et0/3 Desg BLK 100 128.4 Shr Dispute
Et1/0 Desg FWD 100 128.33 Shr
Et1/1 Desg FWD 100 128.34 Shr
IOU2#
Now our topology looks like this:
4 comments
commentsHi Stuart,
ReplyI did your trick, but still can't connect to local server. I can add IOU switches, but when trying to add a router (preferences>IOS routers, locally stored IOS), it tries to connect to the server?
I'm using VMPlayer.
Thanks
Does your local server IP match the IP address in the config file? I have not tried VMPlayer, so not sure if it's something to do with that or not
ReplyThese are the lines in GNS3.ini
Reply----
[Servers]
local_server_host=127.0.0.1
local_server_port=8000
local_server_path=gns3server.exe
remote\size=1
remote\1\host=192.168.106.129
remote\1\port=8000
----
The other unusal thing is that the GNS3 is showing the Python path different that existing one.
http://i60.tinypic.com/333emgy.png
(the path to Python is C:\Python34)
My ini file looks like this:
Replylocal_server_host=192.168.56.1
local_server_port=8000
local_server_path=C:/Program Files (x86)/GNS3-ER/gns3server.exe
remote\size=1
remote\1\host=192.168.56.101
remote\1\port=8000
local_server_auto_start=true
Maybe change your local_server_host to match the remote\1\host ip?
You could try reinstalling Python