01-25-2024 06:27 AM
Hello,
I have encountered a strange issue related to the hsr-ring interface (comprised of g1/3 and g1/4) on IE4000. In case both links get disconnected and the switch is rebooted, I have observed that although the hsr-channel's interface goes up as soon as I connect port 4 to the next hsr-node, the channel speed is not indicated and the ring is not functioning, even though the physical interface's speed, cable type, and duplex mode are recognized without any issues. Connecting port 3 of the channel to the previous node allows the HSR ring to operate normally. The strange thing is that from that point forward I can even disconnect port 3 again and the hsr-ring operates as it should with only port 4 connected
Any advice would be highly appreciated
01-25-2024 09:18 AM
Hello,
post a schematic drawing of your topology, as well as the relevant configurations of the devices involved.
01-25-2024 10:24 AM
Thank you for the reply,
Simple ring topology like below:
"The configuration for each node is identical, as follows:"
interface HSR-ring2
description hsr-ring
switchport trunk allowed vlan xx
switchport trunk native vlan yy
switchport mode trunk
switchport nonegotiate
interface GigabitEthernet1/3
switchport trunk allowed vlan xx
switchport trunk native vlan yy
switchport mode trunk
switchport nonegotiate
lldp transmit
lldp receive
no ptp enable
hsr-ring 2
interface GigabitEthernet1/4
switchport trunk allowed vlan xx
switchport trunk native vlan yy
switchport mode trunk
switchport nonegotiate
lldp transmit
lldp receive
no ptp enable
hsr-ring 2
Long story short, when the g1/3 is inactive, the hsr-ring won't come up after reloading a node.It is important to note that the node is capable of sending and receiving LLDP, CDP, and RPD packets to and from the next node in the clockwise direction. Connecting g1/3 will activate the ring, enabling IP communication from the node, and won't go down even if I disconnect the cable from g1/3 again.
This is the output when the node is up with the hsr ring in a faulty state:
Port Name Status Vlan Duplex Speed Type
Gi1/3 XXXXXXXXXXXXXXX connected trunk auto auto Not Present
Gi1/4 XXXXXXXXXXXXXXX connected trunk a-full a-1000 10/100/1000BaseTX
HS2 hsr-ring connected trunk auto auto
On activating g1/3 will display duplex and speed at HS2 interface as well.
Relative issues are not encountered when the node is rebooted having only the g1/3 active. The absence of g1/4 connection doesn't seem to affect the hsr-ring which comes up as soon as the node boots
01-25-2024 10:12 AM - edited 01-25-2024 10:24 AM
...
01-25-2024 10:49 AM
Hello,
thanks for the drawing and the explanation. I wonder what happens if you enable CDP as well on the interfaces. I know it is optional, and I cannot really find a comprehensive explanation on what it does in HSR...
interface GigabitEthernet1/3
switchport trunk allowed vlan xx
switchport trunk native vlan yy
switchport mode trunk
switchport nonegotiate
lldp transmit
lldp receive
--> cdp enable
no ptp enable
hsr-ring 2
interface GigabitEthernet1/4
switchport trunk allowed vlan xx
switchport trunk native vlan yy
switchport mode trunk
switchport nonegotiate
lldp transmit
lldp receive
--> cdp enable
no ptp enable
hsr-ring 2
01-25-2024 11:02 AM - edited 01-25-2024 11:05 AM
CDP is enabled by default on each interface. However, I made a check and both interfaces show that CDP is running:
GigabitEthernet1/3 is up, line protocol is up
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/4 is up, line protocol is up
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
I believe is informative of the neighboring nodes and nothing more
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