[c-nsp] "continue" clause in route-maps

[Yann GAUTERON]

Hi !

I would like to apply some sophisticated rules with my prefixes announced
with BGP.

I saw that Cisco implemented a "continue" clause that could permit me to
achieve my goal.

Before implemented such rules on my productive routers, I did some tests
with GNS3, but it seems that the "continue" does not work !

For a simple simulation with 2 routers (in BGP AS 1 and AS 2), I cannot see
the expected result.

Configuration on the router in AS1:
ip cef
!
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface GigabitEthernet1/0
 ip address 10.0.0.1 255.255.255.0
 negotiation auto
!
router bgp 1
 no synchronization
 bgp log-neighbor-changes
 network 1.0.0.0 route-map NET-1-0-0-IN
 neighbor 10.0.0.2 remote-as 2
 neighbor 10.0.0.2 send-community
 neighbor 10.0.0.2 route-map PEER-OUT out
 no auto-summary
!
ip forward-protocol nd
ip route 1.0.0.0 255.0.0.0 Null0
!
ip bgp-community new-format
ip community-list 1 permit 1:1
!
route-map PEER-OUT permit 10
 match community 1
 continue
 set community 1:100 additive
!
route-map PEER-OUT permit 20
 set community 1:200 additive
!
route-map NET-1-0-0-IN permit 10
 set community 1:1 1:2 65000:1 65000:2

With this configuration, I would expect my second router (in AS 2), to
receive the prefix 1.0.0.0/8 with the communities 1:1 1:2 1:100 1:200
65000:1 65000:2.

But I cannot see 1:200 in my communities:
Router#sh ip bgp 1.0.0.0
BGP routing table entry for 1.0.0.0/8, version 9
Paths: (1 available, best #1, table Default-IP-Routing-Table)
Flag: 0x820
  Not advertised to any peer
  1
    10.0.0.1 from 10.0.0.1 (1.1.1.1)
      Origin IGP, metric 0, localpref 100, valid, external, best
      Community: 1:1 1:2 1:100 65000:1 65000:2

My GNS3 router is a 7200 and has IOS 12.4(25d). My productive router is a
7600 with 12.2(33)SRE, but I cannot emulate a 7600 on GNS3 !

Is the problem due to a misbehaviour of that IOS 12.4(25d) on my "virtual"
7200, or did I miss something with the way "continue" do work ? Is it a
misbehavior I would face with my productive 7600 ?

Thanks!

Yann



Router#sh ver
Cisco IOS Software, 7200 Software (C7200-P-M), Version 12.4(25d), RELEASE
SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Wed 18-Aug-10 11:54 by prod_rel_team

ROM: ROMMON Emulation Microcode
BOOTLDR: 7200 Software (C7200-P-M), Version 12.4(25d), RELEASE SOFTWARE
(fc1)

Router uptime is 14 minutes
System returned to ROM by unknown reload cause - suspect
boot_data[BOOT_COUNT] 0x0, BOOT_COUNT 0, BOOTDATA 19
System image file is "tftp://255.255.255.255/unknown"

Cisco 7206VXR (NPE400) processor (revision A) with 245760K/16384K bytes of
memory.
Processor board ID 4294967295
R7000 CPU at 150MHz, Implementation 39, Rev 2.1, 256KB L2 Cache
6 slot VXR midplane, Version 2.1

Last reset from power-on

PCI bus mb0_mb1 (Slots 0, 1, 3 and 5) has a capacity of 600 bandwidth
points.
Current configuration on bus mb0_mb1 has a total of 600 bandwidth points.
This configuration is within the PCI bus capacity and is supported.

PCI bus mb2 (Slots 2, 4, 6) has a capacity of 600 bandwidth points.
Current configuration on bus mb2 has a total of 0 bandwidth points
This configuration is within the PCI bus capacity and is supported.

Please refer to the following document "Cisco 7200 Series Port Adaptor
Hardware Configuration Guidelines" on Cisco.com <http://www.cisco.com>
for c7200 bandwidth points oversubscription and usage guidelines.


1 FastEthernet interface
1 Gigabit Ethernet interface
125K bytes of NVRAM.

65536K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).
8192K bytes of Flash internal SIMM (Sector size 256K).
Configuration register is 0x2102