[c-nsp] FW: HSRP Capability in ASR1k

[Matthew Melbourne]

We don't have different MAC addresses; we only use two HSRP groups which
would normally imply two distinct HSRP MAC addresses; one for each group.
The issue we're seeing is we're re-using the same HSRP groups on each
customer sub-interface which (somehow) is limiting the number of
sub-interfaces we can create on a port-channel even though we're re-using
the same HSRP groups. TAC information coming back hasn't been too helpful,
just that "it's a platform limitation", and the workaround has been to
remove the port-channel and use a single physical interface.

Cheers,

Matt

-----Original Message-----
From: Arie Vayner (avayner) [mailto:avayner at cisco.com] 
Sent: 30 September 2010 22:26
To: Matthew Melbourne; Mack O'Brian; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] FW: HSRP Capability in ASR1k

Matt,

I am curious, why do you have to use different MAC addresses for the
different HSRP groups?
If you use the same HSRP group ID on the different sub-ifs, we use the
same MAC address...

Arie

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Matthew
Melbourne
Sent: Thursday, September 30, 2010 21:33
To: 'Mack O'Brian'; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] FW: HSRP Capability in ASR1k

Thanks for info all!

 

Looks like it's 2047 for the SPA-1X10GE-L-V2 and 511 for each GE port of
the
on-board 4-port GE SPA card. Even reusing the same HSRP groups (in this
case
just 1 and 2) on different sub-interfaces on the same physical interface
counts towards the supported maximum on a per-subinterface basis; i.e. 2
HSRP groups on 20 sub-interfaces counts as 40 'HSRP Groups' on the
interface
(even though you'd expect the HSRP MACs to be identical). 

 

We've had to re-architect our solution away from using port-channels for
this reason (only 28 HSRP group are supported on a logical port-channel
interface). Bandwidth utilisation may force an upgrade to 10GE at some
point
in the future, so I wanted to checked on the number of 'HSRP Groups'
supported on the 10GE interfaces.

 

Cheers,

 

Matt

 

From: Mack O'Brian [mailto:mackobrian40 at gmail.com] 
Sent: 30 September 2010 19:44
To: matt at melbourne.org.uk; cisco-nsp at puck.nether.net
Subject: Re: FW: [c-nsp] HSRP Capability in ASR1k

 

here you go:

1006#sho standby capability 

ASR1006                                       * indicates hardware may
support HSRP

                                              |

Interface          Type                       H  Potential Max Groups
per
subin

Gi0/0/0            27  SPA-5X1GE-V2           *  408  VIP has limited AF
entries

Gi0/0/1            27  SPA-5X1GE-V2           *  408  VIP has limited AF
entries

Gi0/0/2            27  SPA-5X1GE-V2           *  408  VIP has limited AF
entries

Gi0/0/3            27  SPA-5X1GE-V2           *  408  VIP has limited AF
entries

Gi0/0/4            27  SPA-5X1GE-V2           *  408  VIP has limited AF
entries

Te0/1/0            89  SPA-1X10GE-L-V2        *  2047 VIP has limited AF
entries

GigabitEthernet0   27  RP management port     *  4096 (0x10B8CE2C,
0x13A41260)

LIIN0              27  LIIN                      -   

LI-Null0           161 Unknown                   -   

1006#








-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Matthew
Melbourne
Sent: Thursday, September 30, 2010 9:37 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] HSRP Capability in ASR1k

Does anyone have a 10G SPA in an ASR1k? If so, could you post the
output of "show standby capability", as it would be interesting to see
whether the 10G interface hardware supports >511 HSRP groups. It would
appears that logical port-channel groups support a very limited number
of HSRP groups.

ASR1-A#sh standby capability
ASR1002                                       * indicates hardware may
support HSRP
                                             |
Interface          Type                       H  Potential Max Groups
per
subin
Gi0/0/0            27  4XGE-BUILT-IN          *  511  VIP has limited AF
entries
Gi0/0/1            27  4XGE-BUILT-IN          *  511  VIP has limited AF
entries
Gi0/0/2            27  4XGE-BUILT-IN          *  511  VIP has limited AF
entries
Gi0/0/3            27  4XGE-BUILT-IN          *  511  VIP has limited AF
entries
GigabitEthernet0   27  RP management port     *  4096 (0x10C4BE20,
0x13E13B80)
LIIN0              27  LIIN                      -
LI-Null0           161 Unknown                   -
Loopback400        96  Loopback                  -
Port-channel6      27  GEChannel              *  28   VIP has limited AF
entries
VoIP-Null0         222 VoIP-Null                 -

Thanks,

Matt

--
Matthew Melbourne
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