LISTSERV mailing list manager LISTSERV 16.0

Help for MICE-DISCUSS Archives


MICE-DISCUSS Archives

MICE-DISCUSS Archives


MICE-DISCUSS@LISTS.IPHOUSE.NET


View:

Message:

[

First

|

Previous

|

Next

|

Last

]

By Topic:

[

First

|

Previous

|

Next

|

Last

]

By Author:

[

First

|

Previous

|

Next

|

Last

]

Font:

Proportional Font

LISTSERV Archives

LISTSERV Archives

MICE-DISCUSS Home

MICE-DISCUSS Home

MICE-DISCUSS  May 2020

MICE-DISCUSS May 2020

Subject:

Re: route server down?

From:

Doug McIntyre <[log in to unmask]>

Reply-To:

MICE Discuss <[log in to unmask]>

Date:

Wed, 6 May 2020 11:49:52 -0500

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (153 lines)

I think we've come up with some methods for potentially creating
filters for this situation to roll out in the future. 

I don't think its' BIRD place to impose restrictions on what a BGP
peer is advertising, even if it is bogus. 

Clearly its only a bug with Brocade, because other vendors (especially Juniper) didn't
care that it was announced this way, I just had a bogus route inserted from them, but
it didn't affect any of my BGP sessions with MICE. 





On Wed, May 06, 2020 at 04:45:33PM +0000, Frank Bulk wrote:
>Do we need to submit a bug to the developers of BIRD?
>
>Frank
>
>From: MICE Discuss <[log in to unmask]> On Behalf Of David Farmer
>Sent: Thursday, April 30, 2020 8:37 AM
>To: [log in to unmask]
>Subject: Re: [MICE-DISCUSS] route server down?
>
>I think it was more than just an invalid next-hop. If it was simply an invalid next-hop that shouldn't have created a malformed BGP update. Unless the invalid next-hop caused BIRD to send out a malformed BGP update.
>
>On Thu, Apr 30, 2020 at 8:24 AM Jay Hanke <[log in to unmask]<mailto:[log in to unmask]>> wrote:
>I emailed xcel about the invalid next-hop address.
>
>We should filter invalid next hops on the route servers.
>
>There also appears to be an issue with how some routers handle the
>invalid next hop.
>
>Are all the peers with the issue of losing the session to RS2 running Brocade?
>
>On Thu, Apr 30, 2020 at 8:17 AM David Farmer <[log in to unmask]<mailto:[log in to unmask]>> wrote:
>>
>> someone with Access should see what route server 2 sees for that prefix, and maybe kick it over after look at it.
>>
>> On Thu, Apr 30, 2020 at 8:04 AM Jay Hanke <[log in to unmask]<mailto:[log in to unmask]>> wrote:
>>>
>>> We're seeing the same with a good next-hop from RS1.
>>>
>>> On Thu, Apr 30, 2020 at 7:55 AM Chris Wopat <[log in to unmask]<mailto:[log in to unmask]>> wrote:
>>> >
>>> > On 4/30/20 7:49 AM, David Farmer wrote:
>>> >
>>> > > We're running IOS XR, I found these droppings in our logs;
>>> > >
>>> >
>>> > RP/0/RP0/CPU0:Apr 29 21:50:26.798 CDT: bgp[1068]:
>>> > %ROUTING-BGP-3-MALFORM_UPDATE : Malformed UPDATE message received from
>>> > neighbor 206.108.255.2 (VRF: default) - message length 59 bytes, error
>>> > flags 0x00000200, action taken "TreatAsWdr". Error details: "Error
>>> > 0x00000200, Field "Attr-data", Attribute 2 (Flags 0x40, Length 0), Data
>>> > [400200]". NLRIs: [IPv4 Unicast] 198.179.154.0/23<https://urldefense.proofpoint.com/v2/url?u=http-3A__198.179.154.0_23&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=xqx0yD1kWOETi5_MVFlMPPxb5us_12870MpQFRgCEns&m=HC4viek-LcVI3v4xHZ-kdoMqXk9oP6L6JJphz73kmL8&s=FyKbPJIOaE5o00czfNutNmUhd7uUDVUIDud4c0xZHC0&e=>
>>> > RP/0/RP1/CPU0:Apr 29 21:50:26.797 CDT: bgp[1068]:
>>> > %ROUTING-BGP-3-MALFORM_UPDATE : Malformed UPDATE message received from
>>> > neighbor 206.108.255.2 (VRF: default) - message length 59 bytes, error
>>> > flags 0x00000200, action taken "TreatAsWdr". Error details: "Error
>>> > 0x00000200, Field "Attr-data", Attribute 2 (Flags 0x40, Length 0), Data
>>> > [400200]". NLRIs: [IPv4 Unicast] 198.179.154.0/23<https://urldefense.proofpoint.com/v2/url?u=http-3A__198.179.154.0_23&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=xqx0yD1kWOETi5_MVFlMPPxb5us_12870MpQFRgCEns&m=HC4viek-LcVI3v4xHZ-kdoMqXk9oP6L6JJphz73kmL8&s=FyKbPJIOaE5o00czfNutNmUhd7uUDVUIDud4c0xZHC0&e=>
>>> > >
>>> > > Maybe try resting you BGP sessions.
>>> > >
>>> > We're seeing a weird next-hop ip on that prefix (rfc1918) and its hidden
>>> > on our net.
>>> >
>>> > Is 10.223.129.2 something internal to route server #2?
>>> >
>>> >  > show route 198.179.154.0 hidden detail
>>> >
>>> > inet.0: 795967 destinations, 2081403 routes (795589 active, 0 holddown,
>>> > 1604 hidden)
>>> > 198.179.154.0/23<https://urldefense.proofpoint.com/v2/url?u=http-3A__198.179.154.0_23&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=xqx0yD1kWOETi5_MVFlMPPxb5us_12870MpQFRgCEns&m=HC4viek-LcVI3v4xHZ-kdoMqXk9oP6L6JJphz73kmL8&s=FyKbPJIOaE5o00czfNutNmUhd7uUDVUIDud4c0xZHC0&e=> (3 entries, 1 announced)
>>> >           BGP
>>> >                  Next hop type: Router, Next hop index: 0
>>> >                  Address: 0x113614cc
>>> >                  Next-hop reference count: 1
>>> >                  Source: 206.108.255.2
>>> >                  Next hop: 10.223.129.2 via xe-0/1/5.300, selected
>>> >                  Session Id: 0x0
>>> >                  State: <Hidden Ext>
>>> >                  Inactive reason: Unusable path
>>> >                  Local AS: 65400 Peer AS: 53679
>>> >                  Age: 10:02:05
>>> >                  Validation State: unverified
>>> >                  Task: BGP_53679.206.108.255.2
>>> >                  AS path: I
>>> >                  Communities: target:21693:1000
>>> >                  Router ID: 206.108.255.2
>>> >                  Hidden reason: protocol nexthop is not on the interface
>>> >
>>> >
>>> > --
>>> > Chris Wopat
>>> > Network Engineer, WiscNet
>>> > [log in to unmask]<mailto:[log in to unmask]>   608-210-3965
>>>
>>>
>>>
>>> --
>>> Jay Hanke, President
>>> South Front Networks
>>> [log in to unmask]<mailto:[log in to unmask]>
>>> Phone  612-204-0000
>>
>>
>>
>> --
>> ===============================================
>> David Farmer               Email:[log in to unmask]<mailto:[log in to unmask]>
>> Networking & Telecommunication Services
>> Office of Information Technology
>> University of Minnesota
>> 2218 University Ave SE        Phone: 612-626-0815
>> Minneapolis, MN 55414-3029   Cell: 612-812-9952
>> ===============================================
>>
>> ________________________________
>>
>> To unsubscribe from the MICE-DISCUSS list, click the following link:
>> http://lists.iphouse.net/cgi-bin/wa?SUBED1=MICE-DISCUSS&A=1<https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.iphouse.net_cgi-2Dbin_wa-3FSUBED1-3DMICE-2DDISCUSS-26A-3D1&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=xqx0yD1kWOETi5_MVFlMPPxb5us_12870MpQFRgCEns&m=HC4viek-LcVI3v4xHZ-kdoMqXk9oP6L6JJphz73kmL8&s=1aL3YJ1V-gX14CJG-PYa38ULVB_ddLzb5TCjLjM4BiQ&e=>
>
>
>
>--
>Jay Hanke, President
>South Front Networks
>[log in to unmask]<mailto:[log in to unmask]>
>Phone  612-204-0000
>
>
>--
>===============================================
>David Farmer               Email:[log in to unmask]<mailto:[log in to unmask]>
>Networking & Telecommunication Services
>Office of Information Technology
>University of Minnesota
>2218 University Ave SE        Phone: 612-626-0815
>Minneapolis, MN 55414-3029   Cell: 612-812-9952
>===============================================
>
>________________________________
>
>To unsubscribe from the MICE-DISCUSS list, click the following link:
>http://lists.iphouse.net/cgi-bin/wa?SUBED1=MICE-DISCUSS&A=1<https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.iphouse.net_cgi-2Dbin_wa-3FSUBED1-3DMICE-2DDISCUSS-26A-3D1&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=xqx0yD1kWOETi5_MVFlMPPxb5us_12870MpQFRgCEns&m=HC4viek-LcVI3v4xHZ-kdoMqXk9oP6L6JJphz73kmL8&s=1aL3YJ1V-gX14CJG-PYa38ULVB_ddLzb5TCjLjM4BiQ&e=>

-- 
Doug McIntyre                            <[log in to unmask]>
                     ~.~ ipHouse ~.~
        Network Engineer/Provisioning/Jack of all Trades

Top of Message | Previous Page | Permalink

Advanced Options


Options

Log In

Log In

Get Password

Get Password


Search Archives

Search Archives


Subscribe or Unsubscribe

Subscribe or Unsubscribe


Archives

June 2020
May 2020
April 2020
March 2020
February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
March 2019
February 2019
January 2019
December 2018
November 2018
October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
April 2018
March 2018
February 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
June 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010

ATOM RSS1 RSS2



LISTS.IPHOUSE.NET

CataList Email List Search Powered by the LISTSERV Email List Manager