From: MADMAN (dmadlan@xxxxxxxxx)
Date: Thu Mar 21 2002 - 11:32:14 GMT-3
not that I'm aware of. I generally don't use a mask with network
statements since I want to announce the full network to the upstream.
dave
Huy Luu wrote:
>
> According to the test which I posted recently, using a mask option with the
> network command got it to work. It does not matter if I set the correct
> network and mask on an interface or not, it does not advertise static,
> directly connected or dynamic without the mask command in the network
> statement in bgp. I think this is something specific to 12.1. 12.0 seems
> to work fine.
>
>
> "Gregg
> Malcolm" To: <ccielab@groupstudy.com>
> <greggm@sbcglo cc:
> bal.net> Subject: Re: BGP routes don't sh
ow up in BGP table
> Sent by:
> nobody@groupst
> udy.com
>
>
> 03/20/02 03:59
> PM
> Please respond
> to "Gregg
> Malcolm"
>
>
>
> Huy,
>
> What you are saying at the end of this message is true *if* your loopback
> had an address of 1.1.1.0 255.0.0.0. If you leave the mask out of the
> network statement, the BGP process must assume a mask (and of course it
> picks a classful mask). I haven't really played with not using a mask as I
> always make it a practice to use masks on network statements in BGP. I
> can't imagine a good reason not to use a mask when it's always an option.
> Try changing the mask on the loop and I think you'll see the route in BGP.
>
> Maybe I'm mis-understanding the question or a missing a fundamental
> property
> of routing in general.
>
> Gregg
>
> ----- Original Message -----
> From: "Huy Luu" <hluu@veroxity.com>
> To: "Tshon" <tshon@netzero.net>
> Cc: <ccielab@groupstudy.com>; "Lab Candidate" <labccie@yahoo.com>;
> <nobody@groupstudy.com>
> Sent: Wednesday, March 20, 2002 12:05 PM
> Subject: Re: BGP routes don't show up in BGP table
>
> > I got it to work, by adding the additional mask command.
> > But I'm still confuse. First I used the network 1.1.1.0, which did not
> > work. I also added no sync and no auto-summary, which did not work. I
> > thought that if I use the network command to advertise a network, and if
> I
> > have a valid route to a subnet of that network, it should advertise the
> > network and auto summarize at the classful boundary. In this example the
> > router should summarize and advertise 1.0.0.0/8 if I use the network
> > statement 1.1.1.0, but it did not.
> >
> >
> >
> >
> > Tshon
> > <tshon@netzero To: Lab Candidate
> <labccie@yahoo.com>
> > .net> cc: ccielab@groupstudy.com
> > Sent by: Subject: Re: BGP routes
> don't
> show up in BGP table
> > nobody@groupst
> > udy.com
> >
> >
> > 03/20/02 02:31
> > PM
> > Please respond
> > to Tshon
> >
> >
> >
> >
> >
> >
> > You will only advertis networks you can reach. You don't have a network
> > 1.1.1.1 in your routing table.
> > You don't have a network 2.2.2.2 in your routing table. Try Network
> > 1.1.1.0 and 2.2.2.0.
> >
> > Tshon
> >
> > Lab Candidate wrote:
> >
> > >Here is a basic BGP setup with r1 and r2:
> > > r1 AS100 r2 AS200
> > > s0----------------s0
> > > lo0 1.1.1.1 lo0 2.2.2.2
> > >I am advertising both r1's and r2's loopbacks lo0 by putting under a
> > network statement.
> > >but somehow they never showed up in the other's BGP table. What am I
> doing
> > wrong?
> > >here is the configs and output from both r1 and r2:
> > >
> > >r1#
> > >1d00h: BGP: 192.168.1.2 went from Idle to Active
> > >1d00h: BGP: 192.168.1.2 open active, delay 15324ms
> > >1d00h: BGP: 192.168.1.2 open active, local address 192.168.1.1
> > >1d00h: BGP: scanning routing tables
> > >1d00h: BGP: nettable_scan: invalidate local path for 1.0.0.0/8
> > >1d00h: BGP: nettable_scan: invalidate sourced path for 1.0.0.0/8
> > >1d00h: BGP: no valid path for 1.0.0.0/8
> > >1d00h: BGP: nettable_walker 1.0.0.0/8 no best path
> > >
> > >r1#sh ip ro
> > >Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> > > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> > > N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> > > E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> > > i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
> > default
> > > U - per-user static route, o - ODR
> > >
> > >Gateway of last resort is not set
> > >
> > > 1.0.0.0/24 is subnetted, 1 subnets
> > >C 1.1.1.0 is directly connected, Loopback0
> > >C 192.168.1.0/24 is directly connected, Serial0
> > >
> > >r1#sh ip bgp
> > > {blank}
> > >r1#
> > >
> > >r1#sh run
> > >Building configuration...
> > >
> > >Current configuration:
> > >!
> > >version 12.0
> > >service timestamps debug uptime
> > >service timestamps log uptime
> > >no service password-encryption
> > >!
> > >hostname r1
> > >!
> > >!
> > >ip subnet-zero
> > >!
> > >!
> > >!
> > >interface Loopback0
> > > ip address 1.1.1.1 255.255.255.0
> > > no ip directed-broadcast
> > >!
> > >interface Ethernet0
> > > no ip address
> > > no ip directed-broadcast
> > > shutdown
> > >!
> > >interface Serial0
> > > ip address 192.168.1.1 255.255.255.0
> > > no ip directed-broadcast
> > > clockrate 64000
> > >!
> > >interface Serial1
> > > no ip address
> > > no ip directed-broadcast
> > > shutdown
> > >!
> > >router bgp 100
> > > network 1.1.1.1
> > > neighbor 192.168.1.2 remote-as 200
> > >!
> > >ip classless
> > >!
> > >!
> > >line con 0
> > > exec-timeout 0 0
> > > logging synchronous
> > > transport input none
> > >line aux 0
> > >line vty 0 4
> > >!
> > >end
> > >
> > >r1#
> > >r1#sh ip bgp nei
> > >BGP neighbor is 192.168.1.2, remote AS 200, external link
> > > Index 1, Offset 0, Mask 0x2
> > > BGP version 4, remote router ID 2.2.2.2
> > > BGP state = Established, table version = 25, up for 00:03:02
> > > Last read 00:00:03, hold time is 180, keepalive interval is 60 seconds
> > > Minimum time between advertisement runs is 30 seconds
> > > Received 6 messages, 0 notifications, 0 in queue
> > > Sent 6 messages, 0 notifications, 0 in queue
> > > Prefix advertised 0, suppressed 0, withdrawn 0
> > > Connections established 1; dropped 0
> > > Last reset never
> > > 0 accepted prefixes consume 0 bytes
> > > 0 history paths consume 0 bytes
> > >Connection state is ESTAB, I/O status: 1, unread input bytes: 0
> > >Local host: 192.168.1.1, Local port: 11000
> > >Foreign host: 192.168.1.2, Foreign port: 179
> > >
> > >Enqueued packets for retransmit: 0, input: 0 mis-ordered: 0 (0 bytes)
> > >
> > >Event Timers (current time is 0x545E3C0):
> > >Timer Starts Wakeups Next
> > >Retrans 19 12 0x0
> > >TimeWait 0 0 0x0
> > >AckHold 6 2 0x0
> > >SendWnd 0 0 0x0
> > >KeepAlive 0 0 0x0
> > >GiveUp 0 0 0x0
> > >PmtuAger 0 0 0x0
> > >DeadWait 0 0 0x0
> > >
> > >iss: 278568032 snduna: 278568157 sndnxt: 278568157 sndwnd:
> 16260
> > >irs: 2897909981 rcvnxt: 2897910106 rcvwnd: 16260 delrcvwnd:
> 124
> > >
> > >SRTT: 614 ms, RTTO: 4262 ms, RTV: 1517 ms, KRTT: 0 ms
> > >minRTT: 24 ms, maxRTT: 300 ms, ACK hold: 200 ms
> > >Flags: higher precedence, nagle
> > >
> > >Datagrams (max data segment is 1460 bytes):
> > >Rcvd: 11 (out of order: 0), with data: 6, total data bytes: 124
> > >Sent: 10 (retransmit: 12), with data: 6, total data bytes: 124
> > >r1#
> > >
> > >=================== r2 config and debug =================
> > >r2#sh run
> > >Building configuration...
> > >
> > >Current configuration:
> > >!
> > >version 12.0
> > >service timestamps debug uptime
> > >service timestamps log uptime
> > >no service password-encryption
> > >!
> > >hostname r2
> > >!
> > >!
> > >ip subnet-zero
> > >!
> > >!
> > >!
> > >interface Loopback0
> > > ip address 2.2.2.2 255.255.255.0
> > > no ip directed-broadcast
> > >!
> > >interface Ethernet0
> > > no ip address
> > > no ip directed-broadcast
> > > shutdown
> > >!
> > >interface Serial0
> > > ip address 192.168.1.2 255.255.255.0
> > > no ip directed-broadcast
> > >!
> > >interface Serial1
> > > no ip address
> > > no ip directed-broadcast
> > > shutdown
> > >!
> > >router bgp 200
> > > network 2.2.2.2
> > > neighbor 192.168.1.1 remote-as 100
> > >!
> > >ip classless
> > >!
> > >!
> > >line con 0
> > > transport input none
> > >line aux 0
> > >line vty 0 4
> > >!
> > >end
> > >
> > >r2#
> > >r2#sh ip int b
> > >Interface IP-Address OK? Method Status
> > Protocol
> > >
> > >Ethernet0 unassigned YES unset administratively down
> > down
> > >
> > >Loopback0 2.2.2.2 YES manual up
> up
> > >
> > >Serial0 192.168.1.2 YES manual up
> up
> > >
> > >Serial1 unassigned YES unset administratively down
> > down
> > >
> > >r2#sh ip ro
> > >Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> > > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> > > N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> > > E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> > > i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
> > default
> > > U - per-user static route, o - ODR
> > >
> > >Gateway of last resort is not set
> > >
> > > 2.0.0.0/24 is subnetted, 1 subnets
> > >C 2.2.2.0 is directly connected, Loopback0
> > >C 192.168.1.0/24 is directly connected, Serial0
> > >
> > >r2#sh ip bgp
> > > {blank}
> > >r2#
> > >
> > >r2#sh ip bgp nei
> > >r2#sh ip bgp neighbors
> > >BGP neighbor is 192.168.1.1, remote AS 100, external link
> > > Index 1, Offset 0, Mask 0x2
> > > BGP version 4, remote router ID 1.1.1.1
> > > BGP state = Established, table version = 23, up for 00:00:17
> > > Last read 00:00:16, hold time is 180, keepalive interval is 60 seconds
> > > Minimum time between advertisement runs is 30 seconds
> > > Received 3 messages, 0 notifications, 0 in queue
> > > Sent 3 messages, 0 notifications, 0 in queue
> > > Prefix advertised 0, suppressed 0, withdrawn 0
> > > Connections established 1; dropped 0
> > > Last reset never
> > > 0 accepted prefixes consume 0 bytes
> > > 0 history paths consume 0 bytes
> > >Connection state is ESTAB, I/O status: 1, unread input bytes: 0
> > >Local host: 192.168.1.2, Local port: 179
> > >Foreign host: 192.168.1.1, Foreign port: 11000
> > >
> > >Enqueued packets for retransmit: 0, input: 0 mis-ordered: 0 (0 bytes)
> > >
> > >Event Timers (current time is 0xF02CC):
> > >Timer Starts Wakeups Next
> > >Retrans 4 0 0x0
> > >TimeWait 0 0 0x0
> > >AckHold 3 2 0x0
> > >SendWnd 0 0 0x0
> > >
> > >KeepAlive 0 0 0x0
> > >GiveUp 0 0 0x0
> > >PmtuAger 0 0 0x0
> > >DeadWait 0 0 0x0
> > >
> > >iss: 2897909981 snduna: 2897910049 sndnxt: 2897910049 sndwnd:
> 16317
> > >irs: 278568032 rcvnxt: 278568100 rcvwnd: 16317 delrcvwnd:
> 67
> > >
> > >SRTT: 710 ms, RTTO: 4442 ms, RTV: 1511 ms, KRTT: 0 ms
> > >minRTT: 16 ms, maxRTT: 300 ms, ACK hold: 200 ms
> > >Flags: passive open, nagle, gen tcbs
> > >
> > >Datagrams (max data segment is 1460 bytes):
> > >Rcvd: 6 (out of order: 0), with data: 3, total data bytes: 67
> > >Sent: 6 (retransmit: 0), with data: 3, total data bytes: 67
> > >r2#sh ip bgp neighbors ?
> > > A.B.C.D Neighbor to display information about
> > > <cr>
> > >
> > >
> > >
> > >
> > >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:57:16 GMT-3