From: Djerk Geurts (djerk@djerk.nl)
Date: Mon Jul 30 2007 - 09:43:45 ART
I'm using 12.2(4)10b on 36040's. turning inverse-arp off does not prevent
the router from replying to in-arp requests. (debugged and the darn things
will still send)
*Mar 14 17:39:36.371: Serial2/1: FR ARP input
*Mar 14 17:39:36.371: datagramstart = 0x6FCD4EE, datagramsize = 34
*Mar 14 17:39:36.371: FR encap = 0x4C110300
*Mar 14 17:39:36.371: 80 00 00 00 08 06 00 0F
*Mar 14 17:39:36.371: Serial2/1: FR ARP input08 00 02 04 00 09 00 00
*Mar 14 17:39:36.371: 98 01 2D 05 4C 11 98 01 7B 03 02 02 00 40
*Mar 14 17:39:36.375:
*Mar 14 17:39:36.375: Serial2/1: inarp received on 305
*Mar 14 17:39:36.375: datagramstart = 0x6E0070E, datagramsize = 34
*Mar 14 17:39:36.375: FR encap = 0x4C010300
*Mar 14 17:39:36.375: 80 00 00 00 08 06 00 0F 08 00 02 04 00 09 00 00
*Mar 14 17:39:36.379: 98 01 2D 04 4C 01 98 01 7B 03 02 02 00 40
*Mar 14 17:39:36.379:
*Mar 14 17:39:36.379: Serial2/1: inarp received on 304
Afaik disabling inverse-arp should make a router blind and mute to the whole
inverse-arp thing. I'm about to pull my hair out...
I have R1 - 5 with full mesh F/R between them
- R4 & 5 PtP using main interfaces and no frame-relay inverse-arp at both
ends
- R3 is a hub with R1 & 2 as spokes (main interfaces as well)
- R1 - 3 should use in-arp
A. R1 - 3 advertise their addresses to R4 & 5 via in-arp, I can't change
this behaviour. If allowed I could only disable in-arp per dlci.
B. R1 - 3 learn R4 * 5's addresses (should not happen inho with in-arp
turned off (at the source).
R4 & R5 (diff IP dlci):
interface Serial2/1
description *** C3640-3 (FR) S1/4 ***
ip address 15.1.45.4 255.255.255.0
encapsulation frame-relay
frame-relay map ip 15.1.45.5 405
no frame-relay inverse-arp
R4(config-if)#do sh fram map
Serial2/1 (up): ip 15.1.45.5 dlci 405(0x195,0x6450), static,
CISCO, status defined, active
Serial2/1 (up): ip 15.1.123.1 dlci 401(0x191,0x6410), dynamic,
broadcast,, status defined, active
Serial2/1 (up): ip 15.1.123.2 dlci 402(0x192,0x6420), dynamic,
broadcast,
CISCO, status defined, active
Serial2/1 (up): ip 15.1.123.3 dlci 403(0x193,0x6430), dynamic,
broadcast,
CISCO, status defined, active
R3 MP interface:
interface Serial2/1
description *** C3640-3 (FR) S1/3 ***
ip address 152.1.123.3 255.255.255.0
encapsulation frame-relay
R3(config-if)#do sh fram map
Serial2/1 (up): ip 152.1.45.4 dlci 304(0x130,0x4C00), dynamic,
broadcast,
CISCO, status defined, active
Serial2/1 (up): ip 152.1.45.5 dlci 305(0x131,0x4C10), dynamic,
broadcast,
CISCO, status defined, active
Serial2/1 (up): ip 152.1.123.1 dlci 301(0x12D,0x48D0), dynamic,
broadcast,, status defined, active
Serial2/1 (up): ip 152.1.123.2 dlci 302(0x12E,0x48E0), dynamic,
broadcast,
CISCO, status defined, active
-- Djerk www.djerk.nl
This archive was generated by hypermail 2.1.4 : Sat Aug 18 2007 - 08:17:42 ART