Can Change OLT default mac address aging time from 5 minutes to 1 or 2 minutes?

Created: May 17, 2019 01:03:04Latest reply: May 17, 2019 03:39:54 272 5 0 0
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Hi, can change OLT default mac address aging time from 5 minutes to 1 minute? if change to 1 minute, what is the impact? This change will affect ONT mac aging time or OLT only?

Another question, default OLT network side (uplink) mac address has high priority than PON Port side, can change to PON port has higher priority ? What is the impact?

Please advise, thanks in advance.

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  • convention:

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GongXiaochuan
Created May 17, 2019 03:39:54 Helpful(0) Helpful(0)

Hi!

On the support website it is already mentioned:

• If the system uses MCUD , SCUN/SCUK and SCUH as the control board, anti-MAC-duplicate takes effect only on the user-side ports that have the same priority for learning MAC addresses. If anti-MAC-duplicate is enabled and the MAC address priorities of network-side ports are different from those of user-side ports, only the MAC addresses of network-side ports can be transferred, while the MAC addresses of other ports cannot be transferred. If the MAC address priorities of the network-side ports are identical to those of user-side ports, the MAC addresses of all ports cannot be transferred. The following rules are used for determining whether the MAC address can be transferred.

• If the port priorities are different, the MAC address of the port with a lower priority can be transferred to the port with a higher priority. However, the MAC address of the port with a higher priority cannot be transferred to the port with a lower priority. That is, the MAC learning entry of the port with a higher priority can overwrite the one of the port with a lower priority. The MAC learning entry of the port with a lower priority, however, cannot overwrite the one of the port with a higher priority.
  • x
  • convention:

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wwww20011
wwww20011 Created May 17, 2019 02:17:20 Helpful(0) Helpful(0)

I think it can be changed, but it should be modified according to the network conditions. Configure the appropriate aging time to effectively use the MAC address aging function. If the aging time configured is too long or too short, it may affect the running performance of the device:

If the aging timer is too long, the device may save many MAC address entries and exhaust the MAC address table. As a result, the device cannot update the MAC address table according to network changes.

If the aging timer is too short, the device may delete a valid MAC address entry. This may cause the device to broadcast a large number of data packets and affect the running performance of the device.
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GongXiaochuan
GongXiaochuan Created May 17, 2019 02:19:52 Helpful(0) Helpful(0)

hi, you can change it , it will affect OLT.

MAC address learning priority of user-side ports higher than that of network-side ports, MAC address will be duplicate

  • x
  • convention:

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Peter2019
Peter2019 Created May 17, 2019 02:29:38 Helpful(0) Helpful(0)

Thanks for you both replies.
"MAC address learning priority of user-side ports higher than that of network-side ports, MAC address will be duplicate"

is it really true? It is different from what some consultant told me before. Below is what he told me.
when OLT in dual homing protection mode, some guy told me the mac address learning priority of network side is higher than user-side, then need to configure layer port isolation on upstream switch (core switch), otherwise, need to wait for 5 minutes when OLT failover.,
Is it correct when OLT failover? Please advise, thanks.
  • x
  • convention:

Peter2019
Peter2019 Created May 17, 2019 02:56:24 Helpful(0) Helpful(0)

Sorry, maybe I misunderstand,
"MAC address learning priority of user-side ports higher than that of network-side ports, MAC address will be duplicate
"
Can you please advise why the mac address will be duplicate?
  • x
  • convention:

GongXiaochuan
GongXiaochuan Created May 17, 2019 03:39:54 Helpful(0) Helpful(0)

Hi!

On the support website it is already mentioned:

• If the system uses MCUD , SCUN/SCUK and SCUH as the control board, anti-MAC-duplicate takes effect only on the user-side ports that have the same priority for learning MAC addresses. If anti-MAC-duplicate is enabled and the MAC address priorities of network-side ports are different from those of user-side ports, only the MAC addresses of network-side ports can be transferred, while the MAC addresses of other ports cannot be transferred. If the MAC address priorities of the network-side ports are identical to those of user-side ports, the MAC addresses of all ports cannot be transferred. The following rules are used for determining whether the MAC address can be transferred.

• If the port priorities are different, the MAC address of the port with a lower priority can be transferred to the port with a higher priority. However, the MAC address of the port with a higher priority cannot be transferred to the port with a lower priority. That is, the MAC learning entry of the port with a higher priority can overwrite the one of the port with a lower priority. The MAC learning entry of the port with a lower priority, however, cannot overwrite the one of the port with a higher priority.
  • x
  • convention:

Good Good Study Day Day Up

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