From: Alexei Monastyrnyi (alexeim@orcsoftware.com)
Date: Sat Apr 08 2006 - 05:17:17 GMT-3
better late but of value... cheers!
Q is closed
----- Original Message -----
From: "Ivan" <ivan@iip.net>
To: <ccielab@groupstudy.com>; "Alexei Monastyrnyi" <alexeim@orcsoftware.com>
Cc: "Nick Griffin" <ngriffin@sio.midco.net>; "Faryar Zabihi (fzabihi)"
<fzabihi@cisco.com>; "Roberto Fernandez" <rofernandez@us.telefonica.com>
Sent: Friday, April 07, 2006 9:50 PM
Subject: Re: What is a Reflector-Port on RSPAN ?
> may be it late.
> My result show that destination port must be connect to send out RSPAN
> packet.
> And reflector port can be down state.
>
> Giga-TCSS#sh mon
> Session 1
> ---------
> Type : Remote Source Session
> Source Ports:
> RX Only: None
> TX Only: None
> Both: Fa0/15
> Source VLANs:
> RX Only: None
> TX Only: None
> Both: None
> Source RSPAN VLAN: None
> Destination Ports: None
> Reflector Port: Fa0/2
> Filter VLANs: None
> Dest RSPAN VLAN: 998
>
> Giga-TCSS#sh int f0/2
> FastEthernet0/2 is administratively down, line protocol is down
> (monitoring)
>
> ----------------------------------------------------------------
>
> another sw
> f0/7 line protocol is up
>
> 3550#sh mon
> Session 1
> ---------
> Type : Remote Destination Session
> Source RSPAN VLAN: 998
> Destination Ports : Fa0/7
> Encapsulation : Native
> Ingress: Disabled
>
> 3550#sh int f0/7 | i packets ou
> 20106 packets output, 13522211 bytes, 151169 underruns
> 3550#sh int f0/7 | i packets ou
> 23163 packets output, 15972133 bytes, 179502 underruns
>
> 3550#sh mon
> Session 1
> ---------
> Type : Remote Destination Session
> Source RSPAN VLAN: 998
> Destination Ports : Fa0/8
> Encapsulation : Native
> Ingress: Disabled
>
>
> f0/8 line protocol is down
> 3550#sh int f0/8 | i packets ou
> 0 packets output, 0 bytes, 0 underruns
> 3550#sh int f0/8 | i packets ou
> 0 packets output, 0 bytes, 0 underruns
>
>
>
>
>> Thanks!
>>
>> But still this reflector port needs to be on-line, connected, or?
>> Logically it shouldn't require that since all it needs is an ability to
>> use interface ASICs internally to reflect packets, which does not imply
>> that any link signal needs to be on the interface.
>>
>> Anyway, better try when I have two switches..
>>
>> Or Petr L,
>> I know you have 2 of 3550.... Could you please lab it up?
>>
>> Cheers,
>> A.
>>
>> on 07/04/2006 02:55 Nick Griffin wrote:
>> > If I understand you correctly, no you do not need to enter "sw access
>> > vlan 44", the reflector port is used to loop the traffic your
>> > monitoring from your source port/vlan, out the interface, back in and
>> > onto the remote span vlan. Configuring the "reflector port"
>> > effectively disables it just as if were a local port used in a local
>> > span session. Unless I'm not catching what your throwing.
>> >
>> > Alexei Monastyrnyi wrote:
>> >> Thanks, but it didn't make things clear for me... sorry.
>> >> Let me put it tis way.
>> >> If RSPAN VLAN is 444, and reflector port is fa 0/21 - do I have to do
>> >>
>> >> in fa 0/21
>> >> sw acc vlan 444
>> >>
>> >> Does this reflector port need to be in "connected" status?
>> >>
>> >> Very practical questions, cause you don't have a way to test this
>> >> config on real lab so you have to know what port to pick as a
>> >> reflector port and how this port should be configured. This part is
>> >> missing on DocCD section regarding RSPAN, ... or I cannot read it.
>> >>
>> >> I used a lot of SPAN sessions within one switch for my work, but
>> >> never RSPAN and in my current lab there is only one 3550 so cannot
>> >> lab it up.
>> >>
>> >> A.
>> >>
>> >> ----- Original Message ----- From: "Faryar Zabihi (fzabihi)"
>> >> <fzabihi@cisco.com>
>> >> To: "Alexei Monastyrnyi" <alexeim@orcsoftware.com>; "Roberto
>> >> Fernandez" <rofernandez@us.telefonica.com>; <ccielab@groupstudy.com>
>> >> Sent: Thursday, April 06, 2006 10:54 PM
>> >> Subject: RE: What is a Reflector-Port on RSPAN ?
>> >>
>> >>
>> >> 1. Any access ports configured into an RSPAN VLAN shall become
>> >> inactive and remain in that state until either the ports are
>> >> configured
>> >> into another VLAN or the VLAN is no longer an RSPAN VLAN.
>> >>
>> >>
>> >>
>> >> 2. Learning is disabled in RSPAN VLANs. This ensures that traffic
>> >> is flooded to all the trunk ports in the VLAN.
>> >>
>> >>
>> >>
>> >> 3. Trunk ports carry RSPAN VLAN traffic like that of any other
>> >> VLAN. VTP pruning supports pruning of RSPAN VLAN traffic on trunk
>> >> ports.
>> >>
>> >>
>> >>
>> >> 4. STP is enabled for all ports in the RSPAN VLAN, to support link
>> >> redundancy while avoiding loops.
>> >>
>> >>
>> >> Faryar Zabihi
>> >>
>> >>
>> >> -----Original Message-----
>> >> From: Alexei Monastyrnyi [mailto:alexeim@orcsoftware.com]
>> >> Sent: Thursday, April 06, 2006 1:47 PM
>> >> To: Faryar Zabihi (fzabihi); Roberto Fernandez; ccielab@groupstudy.com
>> >> Subject: Re: What is a Reflector-Port on RSPAN ?
>> >>
>> >> is that relevant if the reflector port belongs to that special RSPAN
>> >> VLAN?
>> >>
>> >> A.
>> >>
>> >> ----- Original Message -----
>> >> From: "Faryar Zabihi (fzabihi)" <fzabihi@cisco.com>
>> >> To: "Roberto Fernandez" <rofernandez@us.telefonica.com>;
>> >> <ccielab@groupstudy.com>
>> >> Sent: Thursday, April 06, 2006 9:01 PM
>> >> Subject: RE: What is a Reflector-Port on RSPAN ?
>> >>
>> >>> Good doc on rspan...there is a section on reflector-ports
>> >>> http://www.cisco.com/en/US/products/hw/switches/ps663/products_configu
>> >>> ra tion_guide_chapter09186a0080176332.html
>> >>>
>> >>>
>> >>> Faryar Zabihi
>> >>>
>> >>> -----Original Message-----
>> >>> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
>> >>> Of Roberto Fernandez
>> >>> Sent: Thursday, April 06, 2006 10:21 AM
>> >>> To: ccielab@groupstudy.com
>> >>> Subject: What is a Reflector-Port on RSPAN ?
>> >>>
>> >>> Friends,
>> >>>
>> >>> Quick question:
>> >>>
>> >>> What is a reflector-port in regards to the RSPAN configuration? I'm
>> >>> confused on this.
>> >>>
>> >>> Best Regards,
>> >>> Roberto
>> >>>
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>
> --
> Ivan
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