Re: [c-nsp] IS-IS Multiarea on 12.2 SR

2009-11-08 Thread Mikael Abrahamsson

On Sun, 8 Nov 2009, Mark Tinka wrote:


I will say one thing, though. Dividing the IS-IS domain into
L1 and L2 levels accordingly is meant to help you scale.


That might make sense if you have all routes in there, but when just 
carrying loopbacks it kind of stops making sense (at least to me).


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Re: [c-nsp] IS-IS Multiarea on 12.2 SR

2009-11-08 Thread Mark Tinka
On Saturday 07 November 2009 04:08:00 am Justin Shore wrote:

 I was going to through up a red flag about trying to run
 IS-IS on a 3750 because the last time I looked
 fixed-config non-ME Cat switches didn't support IS-IS. 
 However I checked the FN just to be sure since it's been
 a long while since I looked and sure enough they added
 IS-IS to the 3750s with 12.2(50)SE.

We have IS-IS running on 3560G's and 3750's for L1-only, IOS 
12.2(52)SE. All our Ethernet switches run pure Layer 2 
switching, so we're only using IS-IS to provide access to 
the device's Loopback address, for management.

It works.

Cheers,

Mark.


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Re: [c-nsp] IS-IS Multiarea on 12.2 SR

2009-11-08 Thread Mark Tinka
On Friday 06 November 2009 04:09:58 pm Mikael Abrahamsson 
wrote:

 This is probably the biggest problem, the few people
 doing L1-L2 separation are those into academia/theoretics
 (passing a test/exam), when you go into the real world
 it's no longer in major use.

 I've never bothered to learn about ISIS L1, never needed
 to, see no use for it in real life. L2-only is the way to
 go.

 I'd also recommend against it from a sw standpoint. Sure,
 the sw supports it, but it hasn't been exposed to real
 life as much as L2 only because of above reasons.

Well, we switched from OSPF to IS-IS in 2008, and we're 
running:

* L1-only for all routers/switches in a PoP.
* L1/L2 on all core routers.
* L2-only for all PoP-to-PoP core links.

The above has been stable, runs very well - helps us manage 
a multi-Gbps transport network :-).

I will say one thing, though. Dividing the IS-IS domain into 
L1 and L2 levels accordingly is meant to help you scale. 
However, in this case, we trade scaling for optimality (even 
with an L1 and L2 network) by performing Route Leaking on 
all core routers. So if you think about it, it sort of moots 
the point, and perhaps makes an L2-only network an obvious 
choice.

However, we still went ahead to deploy a multi-level IS-IS 
backbone, because there could be some day where we only need 
L1 routes in a specific PoP (which, to be honest, I can't 
see now - but as with anything else in network operations, 
better to be prepared).

Cheers,

Mark.


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Re: [c-nsp] IS-IS Multiarea on 12.2 SR

2009-11-08 Thread Mark Tinka
On Sunday 08 November 2009 04:29:23 pm Mikael Abrahamsson 
wrote:

 That might make sense if you have all routes in there,
 but when just carrying loopbacks it kind of stops making
 sense (at least to me).

Well, a route is a route. The difference between 
philosophies is just the volume.

I get your point, but who's to say I won't have 10,000 
routers in production?

Mark.



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Re: [c-nsp] IS-IS Multiarea on 12.2 SR

2009-11-08 Thread Richard A Steenbergen
On Sun, Nov 08, 2009 at 07:17:24PM +0800, Mark Tinka wrote:
 On Sunday 08 November 2009 04:29:23 pm Mikael Abrahamsson 
 wrote:
 
  That might make sense if you have all routes in there,
  but when just carrying loopbacks it kind of stops making
  sense (at least to me).
 
 Well, a route is a route. The difference between 
 philosophies is just the volume.
 
 I get your point, but who's to say I won't have 10,000 
 routers in production?

IMHO the rule of thumb for multiple areas in either ISIS or OSPF is if
you have to ask whether you should use them or not, the answer is you
shouldn't. Their sensible use is so vastly exagerated in books and lab
tests that it isn't even funny.

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Re: [c-nsp] 3750G vs. Nexus for a SAN

2009-11-08 Thread Andrew White
Any reason why you wouldn't go for fcoe on nexus 5k? :)



On Sat, Nov 7, 2009 at 6:26 AM, Jason Gurtz jasongu...@npumail.com wrote:
 Not sure that you want to go with Nexus at this point. Its got some
 really nice features, however we keep running into code bugs . Not just
 stuff that's obscure and shows up in certain situations but real show-
 stoppers like being unable to form port-channels with HP blade servers.

 Interesting assessment and sorry to hear about the microsoftish
 experience.  We're not intending to use blades (ESX Server 4 on a number
 of HP DL380G6 is likely) and would like to do cross-box etherchannels for
 redundancy.

 Jeff mentioned the 4948 of which the 10G version looks great since we're
 wanting to mirror the san off-site over fiber.

 There's still a chance that fiber channel will happen though it looks like
 that doesn't really make sense in this day and age.  Here, vendors are
 pushing the MDS9124 box.

 Thanks for the responses so far.

 ~JasonG
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Re: [c-nsp] IS-IS Multiarea on 12.2 SR

2009-11-08 Thread Mikael Abrahamsson

On Sun, 8 Nov 2009, Mark Tinka wrote:


Well, a route is a route. The difference between
philosophies is just the volume.

I get your point, but who's to say I won't have 10,000
routers in production?


In order to detect loopbacks going away and using this to 
invalidate/remove next-hops quickly, you can't aggregate anyway.


Sorry, I have yet to hear someone describe an ISP network (designed as per 
ISP essentials, carry loopbacks in IGP and everything else in BGP), where 
IGP aggregation makes sense. If you have 10k routers in your IGP, well, 
you most likely did something wrong earlier in the process.


Also, with modern processorns and techniques such as partial tree 
recalculation in modern router OSes, I'm sure even 10k routers would be 
manageable in a single area.


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[c-nsp] Upgrade to XR-IOS 3.8.1

2009-11-08 Thread Jason Alex
Dear All,
 Kindly i want to upgrade one of my routers to Cisco IOS XR
3.8.1 (Cisco 12410)
my current IOS is 3.6.1

any advice how can i make this upgrade gracefully without any downtime ?
and what are the steps to migrate to version 3.8.1


Thanks  Regards
Jason
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Re: [c-nsp] 3750G vs. Nexus for a SAN

2009-11-08 Thread Brian Landers
I realize this is cisco-nsp, but does anyone have any opinions on the Force
10 S-series for top-of-rack?  Especially for iSCSI SAN.  I've long been
frustrated with Cisco's lack of a cost-effective 48 ports of gigE with a
10ge uplink switch.  I don't really *need* a $12,000 layer 3 switch (or
two) at the top of every rack in my data center!


On Sun, Nov 8, 2009 at 6:49 AM, Andrew White adwh...@inchix.net wrote:

 Any reason why you wouldn't go for fcoe on nexus 5k? :)



 On Sat, Nov 7, 2009 at 6:26 AM, Jason Gurtz jasongu...@npumail.com
 wrote:
  Not sure that you want to go with Nexus at this point. Its got some
  really nice features, however we keep running into code bugs . Not just
  stuff that's obscure and shows up in certain situations but real show-
  stoppers like being unable to form port-channels with HP blade servers.
 
  Interesting assessment and sorry to hear about the microsoftish
  experience.  We're not intending to use blades (ESX Server 4 on a number
  of HP DL380G6 is likely) and would like to do cross-box etherchannels for
  redundancy.
 
  Jeff mentioned the 4948 of which the 10G version looks great since we're
  wanting to mirror the san off-site over fiber.
 
  There's still a chance that fiber channel will happen though it looks
 like
  that doesn't really make sense in this day and age.  Here, vendors are
  pushing the MDS9124 box.
 
  Thanks for the responses so far.
 
  ~JasonG
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Re: [c-nsp] Upgrade to XR-IOS 3.8.1

2009-11-08 Thread William McCall
There will be downtime if you go directly with these versions. Check
with your SE or TAC. IIRC, they should have a list of versions to go
through to do a nice graceful (albeit, with some minor disruptions)
upgrade.


-- 
William McCall, CCIE #25044

On Sun, Nov 8, 2009 at 7:49 AM, Jason Alex amr.c...@gmail.com wrote:
 Dear All,
             Kindly i want to upgrade one of my routers to Cisco IOS XR
 3.8.1 (Cisco 12410)
 my current IOS is 3.6.1

 any advice how can i make this upgrade gracefully without any downtime ?
 and what are the steps to migrate to version 3.8.1


 Thanks  Regards
 Jason
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Re: [c-nsp] Upgrade to XR-IOS 3.8.1

2009-11-08 Thread Eduard Gheorghiu
William, can you give an example of two XR versions that you can migrate
between without reloading the whole box? I would like to try it in the lab
in order to see how it is done.
Thanks,
Eduard

On Nov 8, 2009 8:41 PM, William McCall william.mcc...@gmail.com wrote:

There will be downtime if you go directly with these versions. Check
with your SE or TAC. IIRC, they should have a list of versions to go
through to do a nice graceful (albeit, with some minor disruptions)
upgrade.


--
William McCall, CCIE #25044

On Sun, Nov 8, 2009 at 7:49 AM, Jason Alex amr.c...@gmail.com wrote: 
Dear All,  Ki...
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Re: [c-nsp] unknown ethertype 0x200e

2009-11-08 Thread Nick Hilliard

On 07/11/2009 21:13, Kevin Loch wrote:

Does anyone know what this might be, from a routed interface
on SRD3:

15:00:18.774808 00:02:fc:c1:0d:b2  00:00:00:00:02:02, ethertype Unknown
(0x200e), length 78:
0x: 0001 0203 0405 0607 0809 0a0b 0c0d 0e0f 
0x0010: 1011 1213 1415 1617 1819 1a1b 1c1d 1e1f 
0x0020: 2021 2223 2425 2627 2829 2a2b 2c2d 2e2f .!#$%'()*+,-./
0x0030: 3031 3233 3435 3637 3839 3a3b 3c3d 3e3f 0123456789:;=?

I'd like to know what knob to use to turn it off. Google didn't turn up
anything helpful.


Looks like junk traffic to me.  Might be worth opening up a TAC case: the 
payload looks peculiar and as you note, the ethertype is unknown.  The 
destination mac address also looks odd.


Nick
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Re: [c-nsp] Upgrade to XR-IOS 3.8.1

2009-11-08 Thread Aaron
There isn't a version that you can do that.

Aaron

On Sun, Nov 8, 2009 at 16:01, Eduard Gheorghiu edigheorg...@gmail.comwrote:

 William, can you give an example of two XR versions that you can migrate
 between without reloading the whole box? I would like to try it in the lab
 in order to see how it is done.
 Thanks,
 Eduard

 On Nov 8, 2009 8:41 PM, William McCall william.mcc...@gmail.com wrote:

 There will be downtime if you go directly with these versions. Check
 with your SE or TAC. IIRC, they should have a list of versions to go
 through to do a nice graceful (albeit, with some minor disruptions)
 upgrade.


 --
 William McCall, CCIE #25044

 On Sun, Nov 8, 2009 at 7:49 AM, Jason Alex amr.c...@gmail.com wrote: 
 Dear All,  Ki...
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Re: [c-nsp] Upgrade to XR-IOS 3.8.1

2009-11-08 Thread William McCall
*shrug* I recalled incorrectly. I was under the impression that some
of the minor releases were capable of in-service upgrade. However, it
looks like it just applies to SMUs. And even then, the SMUs might take
out the box.

On Sun, Nov 8, 2009 at 6:22 PM, Aaron dudep...@gmail.com wrote:
 There isn't a version that you can do that.

 Aaron

 On Sun, Nov 8, 2009 at 16:01, Eduard Gheorghiu edigheorg...@gmail.com
 wrote:

 William, can you give an example of two XR versions that you can migrate
 between without reloading the whole box? I would like to try it in the lab
 in order to see how it is done.
 Thanks,
 Eduard

 On Nov 8, 2009 8:41 PM, William McCall william.mcc...@gmail.com wrote:

 There will be downtime if you go directly with these versions. Check
 with your SE or TAC. IIRC, they should have a list of versions to go
 through to do a nice graceful (albeit, with some minor disruptions)
 upgrade.


 --
 William McCall, CCIE #25044

 On Sun, Nov 8, 2009 at 7:49 AM, Jason Alex amr.c...@gmail.com wrote: 
 Dear All,              Ki...
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Re: [c-nsp] Upgrade to XR-IOS 3.8.1

2009-11-08 Thread Aaron
Yeah. ISSU isn't were it should be. Some SMU's require a reload depending on
what componets are touched.

On Sun, Nov 8, 2009 at 19:55, William McCall william.mcc...@gmail.comwrote:

 *shrug* I recalled incorrectly. I was under the impression that some
 of the minor releases were capable of in-service upgrade. However, it
 looks like it just applies to SMUs. And even then, the SMUs might take
 out the box.

 On Sun, Nov 8, 2009 at 6:22 PM, Aaron dudep...@gmail.com wrote:
  There isn't a version that you can do that.
 
  Aaron
 
  On Sun, Nov 8, 2009 at 16:01, Eduard Gheorghiu edigheorg...@gmail.com
  wrote:
 
  William, can you give an example of two XR versions that you can migrate
  between without reloading the whole box? I would like to try it in the
 lab
  in order to see how it is done.
  Thanks,
  Eduard
 
  On Nov 8, 2009 8:41 PM, William McCall william.mcc...@gmail.com
 wrote:
 
  There will be downtime if you go directly with these versions. Check
  with your SE or TAC. IIRC, they should have a list of versions to go
  through to do a nice graceful (albeit, with some minor disruptions)
  upgrade.
 
 
  --
  William McCall, CCIE #25044
 
  On Sun, Nov 8, 2009 at 7:49 AM, Jason Alex amr.c...@gmail.com wrote:
 
  Dear All,  Ki...
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 --
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[c-nsp] Troubelshooting Output Drops on 7301

2009-11-08 Thread Andy Saykao
Hi All,
 
We're seeing some output drops occur on one of our interstate links.
Just wondering how I can track what's causing it and/or whether it's
normal behaviour for the output queue to fill up every now and then
because of an increase in bursty traffic at the time. 
 
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
11624 (Counters were cleared 17 minutes ago.)
 
I've read Cisco's Troubleshooting Input Queue Drops and Output Queue
Drops but it doesn't seem to have any information relating to my
situation. Also searched for help on the list but nothing much to go on.
 
Cisco IOS Software, 7301 Software (C7301-JS-M), Version 12.2(31)SB13,
RELEASE SOFTWARE (fc1)
Cisco 7301 (NPE) processor (revision A) with 229376K/32768K bytes of
memory.
 
interface GigabitEthernet0/2
 description Link from XXX to YYY
 mtu 9000
 bandwidth 15
 ip address 203.17.96.X 255.255.255.252
 load-interval 30
 media-type gbic
 speed auto
 duplex auto
 negotiation auto
 mpls ip
 
routersh int gig 0/2
GigabitEthernet0/2 is up, line protocol is up 
  Hardware is BCM1250 Internal MAC, address is 000b.60a5.ac19 (bia
000b.60a5.ac19)
  Description: Link from XXX to YYY
  Internet address is 203.17.96.X/30
  MTU 9000 bytes, BW 15 Kbit, DLY 10 usec, 
 reliability 255/255, txload 221/255, rxload 153/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full Duplex, 1000Mbps, 1000BaseLX, Auto-negotiation, media type is LX
  output flow-control is XON, input flow-control is XON
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of show interface counters 00:17:33
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
11624
Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  30 second input rate 90511000 bits/sec, 17280 packets/sec
  30 second output rate 130521000 bits/sec, 21551 packets/sec
 18784789 packets input, 3852868380 bytes, 0 no buffer
 Received 1244 broadcasts (0 IP multicasts)
 0 runts, 0 giants, 0 throttles
 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
 0 watchdog, 66127 multicast, 0 pause input
 22942732 packets output, 4128502155 bytes, 0 underruns
 0 output errors, 0 collisions, 0 interface resets
 0 babbles, 0 late collision, 0 deferred
 0 lost carrier, 0 no carrier, 0 PAUSE output
 0 output buffer failures, 0 output buffers swapped out
 
router#sh proc memory
Processor Pool Total:  174234996 Used:   64120552 Free:  11011
  I/O Pool Total:   33554432 Used:3729248 Free:   29825184
 
router#sh processes cpu sorted
CPU utilization for five seconds: 20%/18%; one minute: 19%; five
minutes: 19%
 
Any help would be appreciated.
 
Thanks.
 
Andy

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Re: [c-nsp] IS-IS Multiarea on 12.2 SR

2009-11-08 Thread Richard A Steenbergen
On Mon, Nov 09, 2009 at 02:32:11PM +0800, Mark Tinka wrote:
 On Sunday 08 November 2009 07:33:55 pm Richard A Steenbergen 
 wrote:
 
  IMHO the rule of thumb for multiple areas in either ISIS
  or OSPF is if you have to ask whether you should use
  them or not, the answer is you shouldn't. Their sensible
  use is so vastly exagerated in books and lab tests that
  it isn't even funny.
 
 Speaking on my/our own behalf, there wouldn't be a doubt in 
 our minds whether we needed the hierarchy or not.
 
 In our case, coming from OSPF where Areas were in vast use 
 (different for each PoP, and we had quite a few), it made 
 sense, at the time, to maintain a similar hierarchy in IS-
 IS, especially since what we wanted the most out of the 
 migration was its stretchy property.
 
 However, like I mentioned in an earlier post, it quickly 
 dawned on us that since Route Leaking essentially adds all 
 L1 routes from other PoP's into the L1 database in other 
 PoP's, and you turn off the ATT bit to gain optimality, the 
 point of running both L1 and L2 for scaling reasons quickly 
 becomes moot.

I'm not questioning your decision, I'm just stating it for the archives
and for everyone else who has to make this same decision at some point
in the future: If you have to ask, just don't do it. I see way too many
people trying to deploy areas with 10 router networks because they read
somewhere that it was what they were supposed to do to scale, or because 
people saw it on an exam somewhere.

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Re: [c-nsp] IS-IS Multiarea on 12.2 SR

2009-11-08 Thread Mark Tinka
On Sunday 08 November 2009 07:33:55 pm Richard A Steenbergen 
wrote:

 IMHO the rule of thumb for multiple areas in either ISIS
 or OSPF is if you have to ask whether you should use
 them or not, the answer is you shouldn't. Their sensible
 use is so vastly exagerated in books and lab tests that
 it isn't even funny.

Speaking on my/our own behalf, there wouldn't be a doubt in 
our minds whether we needed the hierarchy or not.

In our case, coming from OSPF where Areas were in vast use 
(different for each PoP, and we had quite a few), it made 
sense, at the time, to maintain a similar hierarchy in IS-
IS, especially since what we wanted the most out of the 
migration was its stretchy property.

However, like I mentioned in an earlier post, it quickly 
dawned on us that since Route Leaking essentially adds all 
L1 routes from other PoP's into the L1 database in other 
PoP's, and you turn off the ATT bit to gain optimality, the 
point of running both L1 and L2 for scaling reasons quickly 
becomes moot.

However, having already gone down that path, in actual 
practice - operationally - it makes very little difference 
(to us) and doesn't add any undue complexity or burden. Only 
our core routers are L1/L2 capable, and those are beasts 
that forward only on MPLS labels. Everything else, i.e., all 
devices within each PoP (edge, peering, upstream, route 
reflectors, RTBH routers, aggregation switches, e.t.c.), 
speaks L1-only.

Cheers,

Mark.


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Re: [c-nsp] 3750G vs. Nexus for a SAN

2009-11-08 Thread Gergely Antal
Did you look at the c2350 also?
http://www.cisco.com/en/US/products/ps10116/index.html

Brian Landers wrote:
 I realize this is cisco-nsp, but does anyone have any opinions on the Force
 10 S-series for top-of-rack?  Especially for iSCSI SAN.  I've long been
 frustrated with Cisco's lack of a cost-effective 48 ports of gigE with a
 10ge uplink switch.  I don't really *need* a $12,000 layer 3 switch (or
 two) at the top of every rack in my data center!
 
 
 On Sun, Nov 8, 2009 at 6:49 AM, Andrew White adwh...@inchix.net wrote:
 
 Any reason why you wouldn't go for fcoe on nexus 5k? :)



 On Sat, Nov 7, 2009 at 6:26 AM, Jason Gurtz jasongu...@npumail.com
 wrote:
 Not sure that you want to go with Nexus at this point. Its got some
 really nice features, however we keep running into code bugs . Not just
 stuff that's obscure and shows up in certain situations but real show-
 stoppers like being unable to form port-channels with HP blade servers.
 Interesting assessment and sorry to hear about the microsoftish
 experience.  We're not intending to use blades (ESX Server 4 on a number
 of HP DL380G6 is likely) and would like to do cross-box etherchannels for
 redundancy.

 Jeff mentioned the 4948 of which the 10G version looks great since we're
 wanting to mirror the san off-site over fiber.

 There's still a chance that fiber channel will happen though it looks
 like
 that doesn't really make sense in this day and age.  Here, vendors are
 pushing the MDS9124 box.

 Thanks for the responses so far.

 ~JasonG
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