From: Ivan (ivan@iip.net)
Date: Fri Apr 07 2006 - 16:50:06 GMT-3
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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