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12-11-2008 02:59 PM
12-11-2008 02:59 PM
difference in how 5304/5406 and 2626/2810 forward its packets
I have this strange issue that I can't find any good explanation for. Basically there seems to be some difference in how 5304/5406 and 2626/2810 forward its packets.
I have a setup with two Juniper routers and several ProCurve switches between. When I change management IP and def.gw to another subnet (I don't do routing on the switches) within the same VLAN of a 53/54 everything is fine. I reach my other router with no issues. But when I do the same trick on a 2510, 2626 or 2810 (i.e. adding another IP in same VLAN), I can't reach the other router. I have full connectivity and can reach the other switches in the same subnet. But not the def.gw.
This is actually a quite severe flaw, because there must be some issue with the forwarding database or the source/destination address.
Anyone else seen this?
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12-14-2008 12:27 PM
12-14-2008 12:27 PM
Re: difference in how 5304/5406 and 2626/2810 forward its packets
Example:
ip default-gateway 1.1.1.254
vlan 1
name "DEFAULT_VLAN"
untagged 1-24
no ip address
exit
vlan 30
name "VLAN30"
tag 23,24
ip address 1.1.1.1 255.255.255.0
exit
primary-vlan 30
Have fun
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12-14-2008 02:20 PM
12-14-2008 02:20 PM
Re: difference in how 5304/5406 and 2626/2810 forward its packets
[Router]--[5304]--[2626]--..--[Router]
So either the 2626 doesn't understand what comes from the Juniper router, or the traffic between the 2626 and the router is silently dropped by the 5304. I have tried rebooting and clearing arp etc.
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12-14-2008 11:58 PM
12-14-2008 11:58 PM
Re: difference in how 5304/5406 and 2626/2810 forward its packets
gn-xx-s1(vlan-99)# sho arp
IP ARP table
IP Address MAC Address Type Port
--------------- ----------------- ------- ----
10.20.26.1 001f12-8cf94c dynamic 23
10.20.26.2 001ffe-92a500 dynamic 23
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