 |
 |
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]> 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]> 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]> > 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]> 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 > >> > 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 > >> > > > >> > > 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 (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:> >> > 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] 608-210-3965 > >> > >> > >> > >> -- > >> Jay Hanke, President > >> South Front Networks > >> [log in to unmask] > >> Phone 612-204-0000 > > > > > > > > -- > > =============================================== > > David Farmer Email:[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 > > > > -- > Jay Hanke, President > South Front Networks > [log in to unmask] > Phone 612-204-0000 > -- =============================================== David Farmer Email:[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 ===============================================