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Issue with Distributed Trunking and pings

ValentinBajrami
Occasional Contributor

Issue with Distributed Trunking and pings

Recently we've configured 4 HP switches which are using Distributed trunking. See picture

switches_ping_issue.png

So the problem is this.

Rack 4 has 2 switches (Left on the picture). One of these switches is the root bridge for the STP instance.

Rack 6 has also 2 switches (Right on the picture). One of these switches is the root bridge for this STP instance.

 

What is failing:

From 10.0.0.13 I am unable to ping 10.0.0.17  and vice versa. I am however able to ping the directly connected switches from 10.0.0.13 as well as from 10.0.0.17

What is going on? 

Trunk status

r11-06-sw-10# show trunks 

Load Balancing Method: L3-based (default)

Port | Name Type | Group Type 
------ + -------------------------------- ---------- + ------ --------
A8 | Trk99-ISC SFP+DA1 | Trk99 LACP 
B7 | Trk1-r11-05-sw-11 SFP+DA3 | Trk1 dt-trunk
B8 | Trk99-ISC SFP+DA1 | Trk99 LACP 
E24 | Trk10-duocast 100/1000T | Trk10 dt-lacp 
F8 | Trk20-r11-04-sw-10 SFP+DA3 | Trk20 dt-lacp

Show lacp peer

r11-06-sw-10# show lacp peer 

LACP Peer Information.


System ID: 3464a9-a10300 


Local Local Port Oper LACP Tx 
Port Trunk System ID Port Priority Key Mode Timer
------ ------ -------------- ----- --------- ------- -------- -----
A8 Trk99 3464a9-9fa300 8 0 1060 Active Slow 
B8 Trk99 3464a9-9fa300 40 0 1060 Active Slow 
E24 Trk10 00239c-16b600 52 127 53 Active Fast 
F8 Trk20 00fd45-5eac00 10161 0 981 Active Slow

Trunk status:

 

r11-04-sw-11# show trunks 

Load Balancing Method: L3-based (default)

Port | Name Type | Group Type 
------ + -------------------------------- ---------- + ------ --------
A7 | Trk30-westpoort-sw-10 SFP+LR | Trk30 dt-lacp 
A8 | Trk99-ISC SFP+DA1 | Trk99 LACP 
B6 | Trk10-r11-04-jnp-10 SFP+SR | Trk10 dt-lacp 
B7 | Trk20-r11-06-sw-11 SFP+DA3 | Trk20 dt-lacp 
B8 | Trk99-ISC SFP+DA1 | Trk99 LACP

 

 


Show lacp peer:

 

r11-04-sw-11# show lacp peer 

LACP Peer Information.


System ID: 00fd45-618100 


Local Local Port Oper LACP Tx 
Port Trunk System ID Port Priority Key Mode Timer
------ ------ -------------- ----- --------- ------- -------- -----
A7 Trk30 1458d0-f50400 40 0 415 Active Slow 
A8 Trk99 00fd45-5eac00 8 0 1060 Active Slow 
B6 Trk10 407183-5e7380 2 127 1 Active Fast 
B7 Trk20 3464a9-9fa300 10161 0 981 Active Slow 
B8 Trk99 00fd45-5eac00 40 0 1060 Active Slow