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Trunk Links
E1or0
Banned Posts: 58 ■■□□□□□□□□
in CCNA & CCENT
Hi guys, I hope some one could help me out here
I have a small lab that includes two Cisco 2950 switches, I would like to wired up a 2nd link to create redundancy between them two, I want to be able to bundle both links right after using EtherChannel, I'm having problems connecting this two switches, I have no idea what type of cable to use either crossover which I think it is or straight through, or on which interface port should the 2nd Link be connected to, I just need the steps to connect both switches, I already know how to configured them after.
Thank you in advance gentlemen
I have a small lab that includes two Cisco 2950 switches, I would like to wired up a 2nd link to create redundancy between them two, I want to be able to bundle both links right after using EtherChannel, I'm having problems connecting this two switches, I have no idea what type of cable to use either crossover which I think it is or straight through, or on which interface port should the 2nd Link be connected to, I just need the steps to connect both switches, I already know how to configured them after.
Thank you in advance gentlemen
Comments
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Optionspeanutnoggin Member Posts: 1,096 ■■■□□□□□□□Elor0,
Crossover is the cable that you want to use. The switchport does not matter... it's good practice to be consistent. I usually use the first port on each switch and the last port as my redundant trunk. So... my config would like this:
SW1 - Fa0/1 ----crossover---- SW2 Fa0/1 (TRUNK)
SW1 - Fa0/12 ----crossover---- SW2 Fa0/12 (TRUNK)
HTH.
V/r
~PeanutWe cannot have a superior democracy with an inferior education system!
-Mayor Cory Booker -
OptionsE1or0 Banned Posts: 58 ■■□□□□□□□□Peanut Thank you for your advised, I will try it once I get home from work and I will let you know if it work for me, I tried that last time crossover on both links but the redundant link one of the switches was giving me an amber yellow light it never went to the forwarding mode ( green ), I guess is because I haven't configured that specific port for trunking ?, I'm currently working on my CCNA Exam so pls I ask some patience here thank you once again peanut for your time
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Optionsmiller811 Member Posts: 897If spanning tree is running it will shut down the second link, since it will it see it a loop.I don't claim to be an expert, but I sure would like to become one someday.
Quest for 11K pages read in 2011
Page Count total to date - 1283 -
Optionscaptobvious Member Posts: 648If spanning tree is running it will shut down the second link, since it will it see it a loop.
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OptionsE1or0 Banned Posts: 58 ■■□□□□□□□□Miller that is so true, thanks for reminding me, I forgot about the SPT blocking that 2nd link avoiding a loop on the switch network, I'm still in the learning process here, before I was using packet tracer a lot, now that i have a pretty decent lab
I can really notice the side effects of any mistake , a physical lab is the best thing to have for the exam,
peanutnoggin
miller811
captobvious
THANK YOU very much guys -
OptionsE1or0 Banned Posts: 58 ■■□□□□□□□□Grrr !!! I'm having a little problem setting up EtherChannel here... Quick question gentlemen does trunk links have to be establish between switches first in order to use EtherChannel or not always? or on which circumstances is that you can perform EtherChannel for redundancy and increase the cost between switches, I have spent now like almost 5 hours trying to figure this out and I haven't been able to set up EtherChannel here yet I think I'm giving up for the night, Will be back tomorrow though
Peanut
Correct me if I'm wrong, I think both redundant links between my two 2950 switches need to be in trunking mode to be able to set them up in EtherChannel, I just noticed that on the example you posted earlier, can you confirm if I'm right? Thanks
SW1 - Fa0/1 ----crossover---- SW2 Fa0/1 (TRUNK)<<
SW1 - Fa0/12 ----crossover---- SW2 Fa0/12 (TRUNK)<<
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Optionsmiller811 Member Posts: 897post the config from your switches so we can see what you are attempting to do.I don't claim to be an expert, but I sure would like to become one someday.
Quest for 11K pages read in 2011
Page Count total to date - 1283 -
Optionselegua Member Posts: 282Grrr !!! I'm having a little problem setting up EtherChannel here... Quick question gentlemen does trunk links have to be establish between switches first in order to use EtherChannel or not always? or on which circumstances is that you can perform EtherChannel for redundancy and increase the cost between switches, I have spent now like almost 5 hours trying to figure this out and I haven't been able to set up EtherChannel here yet I think I'm giving up for the night, Will be back tomorrow though
Peanut
Correct me if I'm wrong, I think both redundant links between my two 2950 switches need to be in trunking mode to be able to set them up in EtherChannel, I just noticed that on the example you posted earlier, can you confirm if I'm right? Thanks
SW1 - Fa0/1 ----crossover---- SW2 Fa0/1 (TRUNK)<<
SW1 - Fa0/12 ----crossover---- SW2 Fa0/12 (TRUNK)<<
Configure the trunks and then etherchannel, i have it configured at home with 4 ports between 2 3550 and its working perfect, one thing that happened to me, i had to reload the switches to get the etherchannel up and running, try that and post the result.3550-1#sh etherchannel port-channel Channel-group listing: ---------------------- Group: 1 ---------- Port-channels in the group: --------------------------- Port-channel: Po1 ------------ Age of the Port-channel = 5d:03h:05m:51s Logical slot/port = 1/0 Number of ports = 4 GC = 0x00000000 HotStandBy port = null Port state = Port-channel Ag-Inuse Protocol = - Port security = Disabled Ports in the Port-channel: Index Load Port EC state No of bits ------+------+------+------------------+----------- 0 00 Fa0/21 On 0 0 00 Fa0/22 On 0 0 00 Fa0/23 On 0 0 00 Fa0/24 On 0 Time since last port bundled: 5d:03h:05m:40s Fa0/22 3550-1#
interface Port-channel1 switchport trunk encapsulation dot1q switchport mode trunk interface FastEthernet0/21 switchport trunk encapsulation dot1q switchport mode trunk channel-group 1 mode on ! interface FastEthernet0/22 switchport trunk encapsulation dot1q switchport mode trunk channel-group 1 mode on ! interface FastEthernet0/23 switchport trunk encapsulation dot1q switchport mode trunk channel-group 1 mode on ! interface FastEthernet0/24 switchport trunk encapsulation dot1q switchport mode trunk channel-group 1 mode on
Hope this help. -
Optionselegua Member Posts: 282Miller that is so true, thanks for reminding me, I forgot about the SPT blocking that 2nd link avoiding a loop on the switch network, I'm still in the learning process here, before I was using packet tracer a lot, now that i have a pretty decent lab
I can really notice the side effects of any mistake , a physical lab is the best thing to have for the exam,
peanutnoggin
miller811
captobvious
THANK YOU very much guys
If you configure etherchannel, STP sees them as a single interface (link) but if you only have 2 trunk ports them STP block one so, using etherchannel you are loop free and both up and running, i have 4 ports and all of then are in fwd state.3550-1#sh spanning-tree VLAN0001 Spanning tree enabled protocol ieee Root ID Priority 32769 Address 000e.39ea.ae00 This bridge is the root Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32769 (priority 32768 sys-id-ext 1) Address 000e.39ea.ae00 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec Interface Role Sts Cost Prio.Nbr Type ------------------- ---- --- --------- -------- -------------------------------- Po1 Desg FWD 8 128.65 P2p
3550-2#sh spanning-tree VLAN0001 Spanning tree enabled protocol ieee Root ID Priority 32769 Address 000e.39ea.ae00 Cost 8 Port 65 (Port-channel1) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32769 (priority 32768 sys-id-ext 1) Address 000f.234f.0300 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec Interface Role Sts Cost Prio.Nbr Type ------------------- ---- --- --------- -------- -------------------------------- Po1 Root FWD 8 128.65 P2p
check the last line on both switches, etherchannel is shows as Po1.
Hope this help. -
OptionsE1or0 Banned Posts: 58 ■■□□□□□□□□
Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Po1 Root FWD 12 128.65 P2p
Elegua you have been a life saver tonight...Thank you very much chief I didn't know I had to trunk both links in order to use EtherChannel, As soon I trunk both links at interfaces Fa0/1 and Fa0/2 and configured EtherChannel after to work on both interfaces, It bundle right away here are my statsSwitch2#sh interfaces port-channel 1 trunk Port Mode Encapsulation Status Native vlan Po1 on 802.1q trunking 1 Port Vlans allowed on trunk Po1 1-4094 Port Vlans allowed and active in management domain Po1 1,20 Port Vlans in spanning tree forwarding state and not pruned Po1 1,20
Switch2#sh etherchannel port-channel Channel-group listing: ----------------------- Group: 1 ---------- Port-channels in the group: ---------------------- Port-channel: Po1 ------------ Age of the Port-channel = 00d:00h:26m:12s Logical slot/port = 1/0 Number of ports = 2 GC = 0x00000000 HotStandBy port = null Port state = Port-channel Ag-Inuse Protocol = - Ports in the Port-channel: Index Load Port EC state ------+------+------+------------ 0 00 Fa0/1 On/FEC 0 00 Fa0/2 On/FEC Time since last port bundled: 00d:00h:12m:36s Fa0/1