[c-nsp] channel fails when using sup 10g port ?

[Jeffrey G. Fitzwater]

I really have to understand why the 16A channel gets built.

All the trunking and port configs are correct. If they were wrong the logs "should" show me what was broke.  Santa checked his list twice, I did it 10 times.


I do have the same config working, using a sup 10g port on another router as a channel member, but it connects to nexus 7018.
In the broken case, both ends use a sup10g port and another X6708 port, but they are not paired to same type at other end (sup-10g to sup-10g) vs (sup-10g to X6708-10g ) not that it should matter.

So the only unique thing, is both ends are sup-720-10g in the broken case.
Its not the LACP proto since I tried  MODE ON with same problem.
What is also odd is when I disable one port of the channel, and do the "show ether channel 16 summ", only the 16 is present with both port (one DOWN). the 16A is gone.
As soon was I enable the other port the 16A shows up.

Whats odd is there is nothing in the log telling why the channel did not come up correctly instead of this 16 and 16A .

Could it have something to do with using both 10G ports on the same sup, but for different functions? One is for this channel the other is just an access port.

Jeff

On Jan 5, 2012, at 10:48 , Andrew Miehs wrote:

Hi Jeff,

On Thu, Jan 5, 2012 at 1:12 PM, Jeffrey G. Fitzwater <jfitz at princeton.edu<mailto:jfitz at princeton.edu>> wrote:
I am trying to use the sup720-10G  10g port and another 10g port on a 6708-10G module as an ether-channel pair.

...
Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
16     Po16(SU)        LACP      Te13/1(P)
16     Po16A(SU)       LACP      Te7/4(P)

-----------------------------------

I do not see this issue on a SXI5 box - see below.

You may want to try:

default interface Te13/1
default interface Te7/4

no inter port16
no inter port16a

interface Te13/1
channel-group 16 mode passive
interface Te7/4
channel-group 16 mode passive

- and then see what "show etherchannel summary" outputs...


==== example config

gv(config-if)#do show etherch summary
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      N - not in use, no aggregation
        f - failed to allocate aggregator

        M - not in use, no aggregation due to minimum links not met
        m - not in use, port not aggregated due to minimum links not met
        u - unsuitable for bundling
        d - default port

        w - waiting to be aggregated
Number of channel-groups in use: 1
Number of aggregators:           1

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
16     Po16(RD)        LACP      Te4/16(D)      Te6/5(D)

gv(config-if)#

interface TenGigabitEthernet4/16
 shutdown
 channel-group 16 mode passive
end

interface TenGigabitEthernet6/5
 shutdown
 channel-group 16 mode passive
end

gv#show version | i SX
Cisco IOS Software, s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version 12.2(33)SXI5, RELEASE SOFTWARE (fc2)
ROM: System Bootstrap, Version 12.2(17r)SX7, RELEASE SOFTWARE (fc1)
System image file is "sup-bootdisk:s72033-advipservicesk9_wan-mz.122-33.SXI5.bin"
gv#