VLANS ISSUE on Cisco switches

Hi,
We have WS-C4507R+E switch and WS-C2960X-24PS-L and we configured VLANs and VTP on 4507 switch we connected 2960X switch on 2960 we configured VTP vlan are communicated on 2960 switch.
Vlan details :38,40.41.42,43,and 44 
4507 switch ip 192.168.38.1
2960 switch ip 192.168.38.2
Ip phone ip 192.168.44.2
Server ip 192.168.44.3
all vlan s are communication is running on both switches only data. On 2960X POE switch ip phone given ip 192.168.44.2  we are unable to ping ip 192.168.44.2 from other vlans we able to ping server ip 192.168.44.3 ip any configuration required on ip phone suggest me.

Hi,
Thanks for your replay
We have 2 routers in this scenario
1st router ip address 192.168.38.1 MPLS Router ,Second 192.168.38.3 2911 V K9  4507 switch ip 192.168.38.2 and 2960X poe switch ip 192.168.38.27 

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    Re: LAG configuration issue on Cisco SG300 52 Switch created by David Hornstein in Small Business Switches - View the full discussion
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  • 3com and cisco switches (802.1q)vlan integration problem - broadcast storm?

    Hi forum,
    we are using 3com switches, the 3com switches implement open vlans, which mean if an ieee 802.1q packet is received at a port and the port is not a member of that vlan, the switch does not perform vlan filtering. if the address is previously learned, it will be forwarded correctly, but if it is not, it will be flooded to all ports within that VLAN.
    my questions:
    1) if another cisco switch connected with the 3com switch are placed in the same vlan, and the 3com switch received a 802.1q packet from a rogue device, it will be flooded to all the ports(including the cisco ports) within that VLANs, will it cause a broadcast storm?
    2) how do i configure the cisco switch to filter off unknown tagged packet on a port? by using vlan prunning?
    3) how do i blocked the broadcast from the 3com switches? using broadcast suppression?
    4) is there a way on the design side to effectly counter this problem?
    Kind regards,
    paul

    It sounds like setup of your 3com switch is not quite up to your requirements. If a port is declared as tagged, it's ok to receive tagged frames for VLAN's that were not previously known on this port. However if your policy requires that only specific VLAN's are permitted on given tagged port, then you need to add some extra command on your 3com switch. Check with documentation and possibly with your 3com support partner.
    As for cisco routers, tagged ports in Cisco-speach are trunks (this might be confusing for you as 3com calls trunks what in Cisco world is known as either Etherchannel or port aggregation). By default a trunk (tagged) port allows any VLAN. If your policy requires so, you can explicitly specify which VLAN's are allowed on given trunk (tagged) port. If a frame arrives with a tag that is not on the allowed list, the frame will be discarded. So you don't need any fancy broadcast supression to block traffic from disallowed vlans coming from your 3com switch to cisco.
    P.S.: Make sure that you don't mistake 'member of VLAN' with 'native VLAN'. Some parts of your message suggest that you do.

  • VLAN trunking from Cisco Catalyst 3750 to Cisco SF300-48P issue and related

    Hello expert,
    I'm having difficulties to configure VLAN trunking between Cisco Catalyst 3750 switch with Cisco SF300-48P switch and my workstation unable to get any DHCP IP from our DHCP server via Cisco SF300-48P switch. Below is the snippet of configuration on both switches:
    [Cisco Catalyst 3750 Switch]
    interface GigabitEthernet1/0/45
     description NCC-CC-1stFlr
     no switchport trunk encapsulation dot1q
     no switchport trunk allowed vlan 101-103
     spanning-tree portfast
    [Cisco SF300-48P Switch]
    interface fastethernet48
     spanning-tree link-type point-to-point
     switchport trunk allowed vlan add 101-103
     macro description switch
     !next command is internal.
     macro auto smartport dynamic_type switch
    interface fastethernet29
     switchport mode general
     switchport general allowed vlan add 103 tagged
     switchport general pvid 103
    Are these are correct? Kindly advice!
    Thank you very much!
    Regards,
    Alex

    Hi Alex,
    for the trunk port on Catalyst on port GE 1/0/45, we need to enable the trunk and for on encapsulation dot1q because this catalyst model is ISL capable also and the SF300 working only with Dot1q Encapsultion
    The configuration on catalyst should :
    #config terminal
    #interface Gi 1/0/45
    # switchport encapsulation 
    #switchport trunk encapsulation dot1q
    #switchport mode trunk 
    #switchport trunk allowed vlan 101-103
    #spanning-tree portfast
    For SF300 the port trunk it looks fine but for the port where the PC should receive an IP address
    #interface fastethernet29
     #switchport mode access
     #switchport ccess vlan 103
    Please let me know after this configuration
    Thanks
    Mehdi
    Please rate or mark as answered to help other Cisco Customers

  • How to get info over snmp on cisco switch whether native vlan on a port is tagged or not?

    Hi!
    I want to know which oid(s) should I query to know whether native vlan on trunk port on cisco switch is tagged or not?
    I am querying the oid .1.3.6.1.4.1.9.9.46.1.6.3.0 (vlanTrunkPortsDot1qTag) on cisco 3560 (E Series) and I am getting global value. Also, this OID is showing as deprecated. So I query .1.3.6.1.4.1.9.9.246.1.6 (cltcDot1qAllTagged) and its subtree, but no value is returned.
    Switch Version is
    Cisco IOS Software, C3560E Software (C3560E-UNIVERSALK9-M), Version 12.2(50)SE2

    Keep in mind that DHCP is a broadcast packet to start. So the AP can only listen in the subnet that it has an IP address for.
    Now, for any other subnet you can use the AP for DHCP but you have to have an IP helper address on your L3 pointing back to the AP.
    That being said, I wouldn't use the DHCP server on the AP as it is limited. You'd be better off using a Microsoft server or some other device that is designed for DHCP.
    HTH,
    Steve

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