IP phone can’t power on through POE interface in S5700

Issue Description

When trying to power on IP Phones via PoE on a S5700-48TP-PWR-SI.
One model Cisco 7911 phone powers model higher than that do not power up.

QQ图片20170811164850

Current Interface Configurations are as follows:

#
interface GigabitEthernet0/0/3
undo negotiation auto
description PC
voice-vlan 4 enable
voice-vlan legacy enable
port hybrid pvid vlan 2
port hybrid tagged vlan 4
port hybrid untagged vlan 2
stp edged-port enable
port-security enable
port-security max-mac-num 3
trust 8021p
trust dscp
#

Alarm Information

No

Handling Process

  1. Confirm if switch checks compatibility between 802.3af and 802.3at Standards.
    a. By default the switch dies not check this feature.

    2. Run:
    <PoE>System-View
    [PoE] int gig 0/0/3
    [PoE-GigabitEthernet0/0/3] poe legacy enable

    Current Interface Configurations are as follows:

    #
    interface GigabitEthernet0/0/3
    undo negotiation auto
    description PC
    voice-vlan 4 enable
    voice-vlan legacy enable
    port hybrid pvid vlan 2
    port hybrid tagged vlan 4
    port hybrid untagged vlan 2
    stp edged-port enable
    poe legacy enable
    port-security enable
    port-security max-mac-num 3
    trust 8021p
    trust dscp
    #

Root Cause

  1. Confirm if PoE is supported by the Switch…
    a. (In this instance it is as some devices work using it.)

    2. Check if other devices (IP phones) are not faulty.
    a. (In this case the phones were working fine when connected on the Cisco switch.)

    3. Check what power requirement they need. E.g PoE standard 802.3af or 802.3at
    a. (in this due to time constraints and lack of material about vendor equipment this could not be verified.)

Solution

<PoE>System-View
[PoE] int gig 0/0/3
[PoE-GigabitEthernet0/0/3] poe legacy enable

Suggestions

No

Huawei PoE switch:

S5700-28X-PWR-LI-AC

S5700-28C-PWR-SI

S5700-28P-PWR-LI-AC

S5700-10P-PWR-LI-AC

S5700-24TP-PWR-SI

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

w

Connecting to %s