Configure The Sr3120 At The Main Site; Hdlc Errors - Avaya 1000 Series Configuration Manual

Configure the SR3120 at the Main Site

SR>/configure> interface bundle ToSite2
SR>/configure/interface/bundle> link ct3 1/1/9
SR>/configure/interface/bundle> encap hdlc
SR>/configure/interface/bundle> hdlc keepalive 20
SR>/configure/interface/bundle> ip addr 192.168.2.1
255.255.255.0
SR>/configure/interface/bundle> exit
Note:
In the above command sequence, the HDLC keepalive time interval was changed from its
default setting of 10 seconds to 20 seconds

HDLC Errors

The way a Secure Router responds to excessive HDLC errors on a link in a bundle has changed
in releases 8.0.1 and higher.
Previously, excessive HDLC errors on a specific bundle would cause that bundle and all
bundles on the router to go up and down. When this happened, the only possible indication
was an event that excessive errors had occurred on a certain freedom channel. This event
would occur if there were 8000 HDLC errors in a row. This information had little value since
there are no displays showing the association between freedom channels and bundle links.
Also the router could get into this condition of all the bundles going up and down prior to the
threshold of 8000 HDLC errors being reached. The problem can happen on T1, E1 and
unframed E1 bundles whether single or multilink PPP.
When this link was bad and the router was flooded with HDLC errors the router would
continually try to bring that link back up immediately. If the error rate was high enough and the
link was brought down it would have the additional problem of not being able to reactivate the
link after the errors stopped.
The additional problem is that when a link has excessive HDLC errors the only reliable way to
stop the problem is to remove the link from the bundle.
In release 8.0.1 and higher, the router a SNMP bundle link down trap is sent when the link
receives excessive HDLC errors. The following example shows a multilink PPP bundle Secure
Router 1000 Series where bundle link E1 10 is having excessive HLDC errors.
snmpTrapOID.0
[1]linkNum (Integer):
[2]linkType (Inte
[3]linkCt3Num (Iner):
[4]linkDownCause(Integer):
is Layer 1 failure
Avaya Secure Router 1000 Series Configuration Guide
BUNDLE-MIB|linkDownTrap
10<-------------------------- E1 Number
e1
0
l1-failures<----------------- Drop cause
HDLC Errors
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