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

Tue Feb 15 00:29:37 EST 2011

Hi Mark,

I forgot to mention that I did try both syntaxes:
* "continue" alone
* "continue" followed by a seq number ("continue 20" in the present case).

Thanks for your feedback.
Y.

2011/2/14 Mark Tees <marktees at gmail.com>

> Hi,
>
> I had this working at one point in time on a 7200 series (dunno which IOS)
> but my config was with 'continue' pointing to a specific rule:
>
>  route-map TRANSIT-OUT permit 10
>  match community MATCH_INTERNAL
> * continue 20
>  set comm-list MATCH_INTERNAL delete
>
> Good luck!
>
>
>
> On 15/02/11 6:03 AM, Yann GAUTERON wrote:
>
>> 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
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