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stacking with ethrecahnnel

mynetwork014
Level 1
Level 1

 

Hello,

 

regarding stacking and etherchannel 

 

follow the below network diagram.

 

topology

Note: r3,r4 are cisco 3750x switches and r4 is hirschmann mach104-20tx-f switch

  1. switch r3 and r6 connected to each other with stacking.
  2. r3 f1/1 interface connected to r4 f1/1 and r6 f1/2 connected to r4f1/2 interface through etherchannel.

how can i achieve physical-redundancy(etherchannel) from r4 to r3,r6  

is it possible to create etherchannel(r4) with two different switch(r3,r6) sources.

is there any specific rules for etherchannel with stacking ?

 

 

 

2 Accepted Solutions

Accepted Solutions

Leo Laohoo
Hall of Fame
Hall of Fame
is it possible to create etherchannel(r4) with two different switch(r3,r6) sources.

Yes it is possible and it's very common you can form an etherchannel to a stack of switches. 

is there any specific rules for etherchannel with stacking ?

Same rule applies:  Maximum of eight etherchannels and all physical link should be of the same speed. 

 

When configuring etherchannels on a switch stack always remember to think of the stack as a SINGLE LOGICAL SWITCH (and not as a multiple switches that form a stack).

View solution in original post

prajithtr_2
Level 1
Level 1

Of course it is possible achieve.This method is called cross stack ether channel.Even though Cisco's proprietary  protocol PAgP doesn't support it,with LACP and without the ether-channel negotiation (ON)protocol also we can do it.Please check the IOS version because Only Software Release 12.2(25)SEC and later support  cross stack ether channel.please refer the below document.Pl

http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/69979-cross-stack-etherchannel.html#config2

Regards

PrajithTR

 

View solution in original post

2 Replies 2

Leo Laohoo
Hall of Fame
Hall of Fame
is it possible to create etherchannel(r4) with two different switch(r3,r6) sources.

Yes it is possible and it's very common you can form an etherchannel to a stack of switches. 

is there any specific rules for etherchannel with stacking ?

Same rule applies:  Maximum of eight etherchannels and all physical link should be of the same speed. 

 

When configuring etherchannels on a switch stack always remember to think of the stack as a SINGLE LOGICAL SWITCH (and not as a multiple switches that form a stack).

prajithtr_2
Level 1
Level 1

Of course it is possible achieve.This method is called cross stack ether channel.Even though Cisco's proprietary  protocol PAgP doesn't support it,with LACP and without the ether-channel negotiation (ON)protocol also we can do it.Please check the IOS version because Only Software Release 12.2(25)SEC and later support  cross stack ether channel.please refer the below document.Pl

http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/69979-cross-stack-etherchannel.html#config2

Regards

PrajithTR

 

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